./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix003_power.opt_pso.opt_rmo.opt_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix003_power.opt_pso.opt_rmo.opt_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix003_power.opt_pso.opt_rmo.opt_tso.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix003_power.opt_pso.opt_rmo.opt_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-03 19:04:42,917 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 19:04:42,956 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 19:04:42,965 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 19:04:42,966 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 19:04:42,991 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 19:04:42,994 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 19:04:42,994 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 19:04:42,995 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 19:04:42,998 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 19:04:42,998 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 19:04:42,998 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 19:04:42,999 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 19:04:43,000 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 19:04:43,000 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 19:04:43,001 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 19:04:43,001 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 19:04:43,001 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 19:04:43,001 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 19:04:43,002 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 19:04:43,002 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 19:04:43,003 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 19:04:43,003 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 19:04:43,003 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 19:04:43,003 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 19:04:43,004 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 19:04:43,004 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 19:04:43,004 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 19:04:43,005 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 19:04:43,005 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 19:04:43,006 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 19:04:43,006 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 19:04:43,006 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:04:43,006 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 19:04:43,006 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 19:04:43,007 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 19:04:43,007 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 19:04:43,007 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 19:04:43,007 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 19:04:43,007 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 19:04:43,007 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 19:04:43,008 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 19:04:43,008 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 19:04:43,008 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 19:04:43,286 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 19:04:43,314 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 19:04:43,316 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 19:04:43,317 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 19:04:43,317 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 19:04:43,318 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix003_power.opt_pso.opt_rmo.opt_tso.opt.i [2024-06-03 19:04:44,410 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 19:04:44,625 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 19:04:44,625 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix003_power.opt_pso.opt_rmo.opt_tso.opt.i [2024-06-03 19:04:44,636 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/235b83df0/f931bd1adceb4fdca6ef85f4ba133b5d/FLAG8da8f92d7 [2024-06-03 19:04:44,649 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/235b83df0/f931bd1adceb4fdca6ef85f4ba133b5d [2024-06-03 19:04:44,651 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 19:04:44,652 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 19:04:44,652 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix003_power.opt_pso.opt_rmo.opt_tso.opt.yml/witness.yml [2024-06-03 19:04:44,769 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 19:04:44,770 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 19:04:44,771 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 19:04:44,771 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 19:04:44,775 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 19:04:44,775 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:04:44" (1/2) ... [2024-06-03 19:04:44,776 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35980375 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:04:44, skipping insertion in model container [2024-06-03 19:04:44,776 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:04:44" (1/2) ... [2024-06-03 19:04:44,777 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5c23cb78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:04:44, skipping insertion in model container [2024-06-03 19:04:44,777 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:04:44" (2/2) ... [2024-06-03 19:04:44,778 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35980375 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:04:44, skipping insertion in model container [2024-06-03 19:04:44,778 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:04:44" (2/2) ... [2024-06-03 19:04:44,778 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 19:04:44,855 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 19:04:44,856 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] ((((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-06-03 19:04:44,857 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] ((((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-06-03 19:04:44,857 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] ((((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-06-03 19:04:44,857 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 19:04:44,857 INFO L106 edCorrectnessWitness]: ghost_update [L849-L849] multithreaded = 1; [2024-06-03 19:04:44,894 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 19:04:45,204 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:04:45,217 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 19:04:45,328 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:04:45,364 INFO L206 MainTranslator]: Completed translation [2024-06-03 19:04:45,364 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:04:45 WrapperNode [2024-06-03 19:04:45,364 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 19:04:45,366 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 19:04:45,366 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 19:04:45,367 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 19:04:45,372 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:04:45" (1/1) ... [2024-06-03 19:04:45,390 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:04:45" (1/1) ... [2024-06-03 19:04:45,432 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 150 [2024-06-03 19:04:45,433 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 19:04:45,433 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 19:04:45,433 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 19:04:45,434 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 19:04:45,442 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:04:45" (1/1) ... [2024-06-03 19:04:45,442 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:04:45" (1/1) ... [2024-06-03 19:04:45,445 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:04:45" (1/1) ... [2024-06-03 19:04:45,473 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-03 19:04:45,473 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:04:45" (1/1) ... [2024-06-03 19:04:45,473 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:04:45" (1/1) ... [2024-06-03 19:04:45,481 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:04:45" (1/1) ... [2024-06-03 19:04:45,482 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:04:45" (1/1) ... [2024-06-03 19:04:45,483 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:04:45" (1/1) ... [2024-06-03 19:04:45,484 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:04:45" (1/1) ... [2024-06-03 19:04:45,487 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 19:04:45,488 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 19:04:45,488 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 19:04:45,488 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 19:04:45,489 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:04:45" (1/1) ... [2024-06-03 19:04:45,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:04:45,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 19:04:45,555 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-03 19:04:45,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-03 19:04:45,617 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 19:04:45,617 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 19:04:45,618 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 19:04:45,618 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 19:04:45,618 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 19:04:45,618 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 19:04:45,618 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 19:04:45,618 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 19:04:45,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 19:04:45,619 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 19:04:45,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 19:04:45,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 19:04:45,620 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 19:04:45,774 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 19:04:45,776 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 19:04:46,060 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 19:04:46,060 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 19:04:46,224 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 19:04:46,224 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 19:04:46,226 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:04:46 BoogieIcfgContainer [2024-06-03 19:04:46,226 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 19:04:46,228 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 19:04:46,229 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 19:04:46,231 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 19:04:46,231 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 07:04:44" (1/4) ... [2024-06-03 19:04:46,232 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@295b7946 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:04:46, skipping insertion in model container [2024-06-03 19:04:46,232 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:04:44" (2/4) ... [2024-06-03 19:04:46,233 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@295b7946 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 07:04:46, skipping insertion in model container [2024-06-03 19:04:46,233 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:04:45" (3/4) ... [2024-06-03 19:04:46,233 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@295b7946 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 07:04:46, skipping insertion in model container [2024-06-03 19:04:46,233 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:04:46" (4/4) ... [2024-06-03 19:04:46,234 INFO L112 eAbstractionObserver]: Analyzing ICFG mix003_power.opt_pso.opt_rmo.opt_tso.opt.i [2024-06-03 19:04:46,247 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 19:04:46,248 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-03 19:04:46,248 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 19:04:46,290 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 19:04:46,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-03 19:04:46,352 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-03 19:04:46,352 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:04:46,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 65 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-03 19:04:46,353 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-03 19:04:46,356 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-03 19:04:46,368 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 19:04:46,374 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3c92b287, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 19:04:46,374 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-03 19:04:46,379 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 19:04:46,379 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 19:04:46,379 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:04:46,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:04:46,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 19:04:46,380 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:04:46,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:04:46,384 INFO L85 PathProgramCache]: Analyzing trace with hash -377810500, now seen corresponding path program 1 times [2024-06-03 19:04:46,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:04:46,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400998857] [2024-06-03 19:04:46,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:04:46,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:04:46,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:04:47,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:04:47,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:04:47,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400998857] [2024-06-03 19:04:47,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400998857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:04:47,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:04:47,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 19:04:47,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347009122] [2024-06-03 19:04:47,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:04:47,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 19:04:47,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:04:47,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 19:04:47,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 19:04:47,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 43 [2024-06-03 19:04:47,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:04:47,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:04:47,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 43 [2024-06-03 19:04:47,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:04:47,858 INFO L124 PetriNetUnfolderBase]: 869/1406 cut-off events. [2024-06-03 19:04:47,858 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-06-03 19:04:47,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2786 conditions, 1406 events. 869/1406 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7216 event pairs, 566 based on Foata normal form. 1/1349 useless extension candidates. Maximal degree in co-relation 2771. Up to 1315 conditions per place. [2024-06-03 19:04:47,869 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 32 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-03 19:04:47,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 175 flow [2024-06-03 19:04:47,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 19:04:47,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 19:04:47,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2024-06-03 19:04:47,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627906976744186 [2024-06-03 19:04:47,879 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 81 transitions. [2024-06-03 19:04:47,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 175 flow [2024-06-03 19:04:47,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 19:04:47,883 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-03 19:04:47,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-03 19:04:47,886 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-03 19:04:47,887 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-03 19:04:47,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:04:47,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:04:47,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:04:47,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 19:04:47,888 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:04:47,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:04:47,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1996366299, now seen corresponding path program 1 times [2024-06-03 19:04:47,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:04:47,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736038862] [2024-06-03 19:04:47,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:04:47,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:04:47,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:04:48,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:04:48,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:04:48,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736038862] [2024-06-03 19:04:48,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736038862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:04:48,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:04:48,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 19:04:48,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780335639] [2024-06-03 19:04:48,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:04:48,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 19:04:48,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:04:48,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 19:04:48,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 19:04:48,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-03 19:04:48,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:04:48,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:04:48,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-03 19:04:48,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:04:48,948 INFO L124 PetriNetUnfolderBase]: 996/1572 cut-off events. [2024-06-03 19:04:48,948 INFO L125 PetriNetUnfolderBase]: For 338/338 co-relation queries the response was YES. [2024-06-03 19:04:48,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3589 conditions, 1572 events. 996/1572 cut-off events. For 338/338 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7871 event pairs, 519 based on Foata normal form. 3/1572 useless extension candidates. Maximal degree in co-relation 3574. Up to 1484 conditions per place. [2024-06-03 19:04:48,958 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 40 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-03 19:04:48,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 54 transitions, 244 flow [2024-06-03 19:04:48,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 19:04:48,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 19:04:48,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-03 19:04:48,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5930232558139535 [2024-06-03 19:04:48,962 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 102 transitions. [2024-06-03 19:04:48,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 54 transitions, 244 flow [2024-06-03 19:04:48,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 54 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 19:04:48,966 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-03 19:04:48,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-03 19:04:48,967 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-03 19:04:48,967 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-03 19:04:48,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:04:48,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:04:48,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:04:48,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 19:04:48,969 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:04:48,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:04:48,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1337464378, now seen corresponding path program 1 times [2024-06-03 19:04:48,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:04:48,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005571477] [2024-06-03 19:04:48,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:04:48,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:04:48,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:04:50,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:04:50,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:04:50,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005571477] [2024-06-03 19:04:50,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005571477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:04:50,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:04:50,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:04:50,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544665313] [2024-06-03 19:04:50,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:04:50,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:04:50,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:04:50,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:04:50,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:04:50,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-03 19:04:50,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:04:50,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:04:50,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-03 19:04:50,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:04:50,500 INFO L124 PetriNetUnfolderBase]: 1265/1959 cut-off events. [2024-06-03 19:04:50,501 INFO L125 PetriNetUnfolderBase]: For 1122/1122 co-relation queries the response was YES. [2024-06-03 19:04:50,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4958 conditions, 1959 events. 1265/1959 cut-off events. For 1122/1122 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9637 event pairs, 445 based on Foata normal form. 6/1959 useless extension candidates. Maximal degree in co-relation 4941. Up to 1828 conditions per place. [2024-06-03 19:04:50,511 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 52 selfloop transitions, 12 changer transitions 0/70 dead transitions. [2024-06-03 19:04:50,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 70 transitions, 356 flow [2024-06-03 19:04:50,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:04:50,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:04:50,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-03 19:04:50,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5387596899224806 [2024-06-03 19:04:50,513 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 6 states and 139 transitions. [2024-06-03 19:04:50,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 70 transitions, 356 flow [2024-06-03 19:04:50,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 70 transitions, 336 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-03 19:04:50,515 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 183 flow [2024-06-03 19:04:50,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=183, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-06-03 19:04:50,516 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 7 predicate places. [2024-06-03 19:04:50,516 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 183 flow [2024-06-03 19:04:50,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:04:50,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:04:50,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:04:50,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 19:04:50,517 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:04:50,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:04:50,518 INFO L85 PathProgramCache]: Analyzing trace with hash 668599817, now seen corresponding path program 1 times [2024-06-03 19:04:50,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:04:50,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255316439] [2024-06-03 19:04:50,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:04:50,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:04:50,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:04:51,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:04:51,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:04:51,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255316439] [2024-06-03 19:04:51,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255316439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:04:51,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:04:51,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:04:51,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629197346] [2024-06-03 19:04:51,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:04:51,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:04:51,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:04:51,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:04:51,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:04:51,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:04:51,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 183 flow. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:04:51,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:04:51,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:04:51,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:04:51,592 INFO L124 PetriNetUnfolderBase]: 1333/2085 cut-off events. [2024-06-03 19:04:51,593 INFO L125 PetriNetUnfolderBase]: For 2082/2082 co-relation queries the response was YES. [2024-06-03 19:04:51,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5740 conditions, 2085 events. 1333/2085 cut-off events. For 2082/2082 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 10389 event pairs, 592 based on Foata normal form. 2/2046 useless extension candidates. Maximal degree in co-relation 5721. Up to 1980 conditions per place. [2024-06-03 19:04:51,605 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 44 selfloop transitions, 8 changer transitions 0/58 dead transitions. [2024-06-03 19:04:51,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 58 transitions, 329 flow [2024-06-03 19:04:51,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:04:51,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:04:51,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 101 transitions. [2024-06-03 19:04:51,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697674418604651 [2024-06-03 19:04:51,606 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 183 flow. Second operand 5 states and 101 transitions. [2024-06-03 19:04:51,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 58 transitions, 329 flow [2024-06-03 19:04:51,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 58 transitions, 302 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-03 19:04:51,610 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 200 flow [2024-06-03 19:04:51,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=200, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2024-06-03 19:04:51,610 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 9 predicate places. [2024-06-03 19:04:51,611 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 200 flow [2024-06-03 19:04:51,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:04:51,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:04:51,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:04:51,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 19:04:51,611 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:04:51,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:04:51,612 INFO L85 PathProgramCache]: Analyzing trace with hash -737515851, now seen corresponding path program 1 times [2024-06-03 19:04:51,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:04:51,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437650046] [2024-06-03 19:04:51,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:04:51,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:04:51,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:04:52,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:04:52,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:04:52,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437650046] [2024-06-03 19:04:52,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437650046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:04:52,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:04:52,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:04:52,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12060538] [2024-06-03 19:04:52,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:04:52,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:04:52,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:04:52,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:04:52,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:04:52,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:04:52,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 200 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:04:52,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:04:52,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:04:52,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:04:52,920 INFO L124 PetriNetUnfolderBase]: 1323/2107 cut-off events. [2024-06-03 19:04:52,920 INFO L125 PetriNetUnfolderBase]: For 3045/3045 co-relation queries the response was YES. [2024-06-03 19:04:52,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6177 conditions, 2107 events. 1323/2107 cut-off events. For 3045/3045 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 10641 event pairs, 556 based on Foata normal form. 4/2102 useless extension candidates. Maximal degree in co-relation 6156. Up to 1948 conditions per place. [2024-06-03 19:04:52,931 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 49 selfloop transitions, 11 changer transitions 0/66 dead transitions. [2024-06-03 19:04:52,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 66 transitions, 378 flow [2024-06-03 19:04:52,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:04:52,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:04:52,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-03 19:04:52,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-03 19:04:52,932 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 200 flow. Second operand 6 states and 120 transitions. [2024-06-03 19:04:52,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 66 transitions, 378 flow [2024-06-03 19:04:52,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 66 transitions, 358 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-03 19:04:52,935 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 234 flow [2024-06-03 19:04:52,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=234, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2024-06-03 19:04:52,936 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 12 predicate places. [2024-06-03 19:04:52,936 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 234 flow [2024-06-03 19:04:52,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:04:52,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:04:52,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:04:52,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 19:04:52,937 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:04:52,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:04:52,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1181685930, now seen corresponding path program 1 times [2024-06-03 19:04:52,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:04:52,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223781114] [2024-06-03 19:04:52,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:04:52,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:04:52,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:04:53,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:04:53,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:04:53,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223781114] [2024-06-03 19:04:53,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223781114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:04:53,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:04:53,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:04:53,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143960165] [2024-06-03 19:04:53,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:04:53,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:04:53,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:04:53,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:04:53,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:04:53,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:04:53,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 234 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:04:53,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:04:53,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:04:53,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:04:54,194 INFO L124 PetriNetUnfolderBase]: 1541/2335 cut-off events. [2024-06-03 19:04:54,195 INFO L125 PetriNetUnfolderBase]: For 5142/5146 co-relation queries the response was YES. [2024-06-03 19:04:54,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7555 conditions, 2335 events. 1541/2335 cut-off events. For 5142/5146 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11192 event pairs, 656 based on Foata normal form. 6/2340 useless extension candidates. Maximal degree in co-relation 7533. Up to 2244 conditions per place. [2024-06-03 19:04:54,207 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 55 selfloop transitions, 16 changer transitions 0/76 dead transitions. [2024-06-03 19:04:54,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 76 transitions, 486 flow [2024-06-03 19:04:54,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:04:54,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:04:54,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-03 19:04:54,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4689922480620155 [2024-06-03 19:04:54,209 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 234 flow. Second operand 6 states and 121 transitions. [2024-06-03 19:04:54,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 76 transitions, 486 flow [2024-06-03 19:04:54,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 76 transitions, 456 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-03 19:04:54,214 INFO L231 Difference]: Finished difference. Result has 58 places, 56 transitions, 290 flow [2024-06-03 19:04:54,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=290, PETRI_PLACES=58, PETRI_TRANSITIONS=56} [2024-06-03 19:04:54,216 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-06-03 19:04:54,216 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 56 transitions, 290 flow [2024-06-03 19:04:54,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:04:54,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:04:54,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:04:54,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 19:04:54,217 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:04:54,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:04:54,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1376369794, now seen corresponding path program 2 times [2024-06-03 19:04:54,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:04:54,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544147766] [2024-06-03 19:04:54,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:04:54,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:04:54,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:04:54,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:04:54,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:04:54,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544147766] [2024-06-03 19:04:54,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544147766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:04:54,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:04:54,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:04:54,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372131134] [2024-06-03 19:04:54,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:04:54,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:04:54,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:04:54,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:04:54,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:04:54,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:04:54,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 56 transitions, 290 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:04:54,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:04:54,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:04:54,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:04:55,455 INFO L124 PetriNetUnfolderBase]: 1536/2329 cut-off events. [2024-06-03 19:04:55,455 INFO L125 PetriNetUnfolderBase]: For 6877/6881 co-relation queries the response was YES. [2024-06-03 19:04:55,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8052 conditions, 2329 events. 1536/2329 cut-off events. For 6877/6881 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11180 event pairs, 659 based on Foata normal form. 6/2334 useless extension candidates. Maximal degree in co-relation 8029. Up to 2239 conditions per place. [2024-06-03 19:04:55,476 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 50 selfloop transitions, 16 changer transitions 0/71 dead transitions. [2024-06-03 19:04:55,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 71 transitions, 460 flow [2024-06-03 19:04:55,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:04:55,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:04:55,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-03 19:04:55,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-03 19:04:55,477 INFO L175 Difference]: Start difference. First operand has 58 places, 56 transitions, 290 flow. Second operand 6 states and 116 transitions. [2024-06-03 19:04:55,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 71 transitions, 460 flow [2024-06-03 19:04:55,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 71 transitions, 426 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-03 19:04:55,484 INFO L231 Difference]: Finished difference. Result has 62 places, 56 transitions, 296 flow [2024-06-03 19:04:55,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=296, PETRI_PLACES=62, PETRI_TRANSITIONS=56} [2024-06-03 19:04:55,486 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 18 predicate places. [2024-06-03 19:04:55,486 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 56 transitions, 296 flow [2024-06-03 19:04:55,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:04:55,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:04:55,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:04:55,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 19:04:55,487 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:04:55,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:04:55,487 INFO L85 PathProgramCache]: Analyzing trace with hash 758602050, now seen corresponding path program 1 times [2024-06-03 19:04:55,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:04:55,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854946638] [2024-06-03 19:04:55,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:04:55,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:04:55,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:04:56,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:04:56,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:04:56,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854946638] [2024-06-03 19:04:56,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854946638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:04:56,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:04:56,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:04:56,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114097073] [2024-06-03 19:04:56,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:04:56,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:04:56,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:04:56,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:04:56,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:04:56,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:04:56,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 296 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:04:56,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:04:56,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:04:56,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:04:56,802 INFO L124 PetriNetUnfolderBase]: 1583/2407 cut-off events. [2024-06-03 19:04:56,802 INFO L125 PetriNetUnfolderBase]: For 8165/8167 co-relation queries the response was YES. [2024-06-03 19:04:56,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8456 conditions, 2407 events. 1583/2407 cut-off events. For 8165/8167 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11601 event pairs, 652 based on Foata normal form. 4/2410 useless extension candidates. Maximal degree in co-relation 8431. Up to 2291 conditions per place. [2024-06-03 19:04:56,815 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 67 selfloop transitions, 24 changer transitions 0/96 dead transitions. [2024-06-03 19:04:56,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 96 transitions, 632 flow [2024-06-03 19:04:56,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:04:56,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:04:56,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-03 19:04:56,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-03 19:04:56,817 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 296 flow. Second operand 8 states and 155 transitions. [2024-06-03 19:04:56,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 96 transitions, 632 flow [2024-06-03 19:04:56,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 96 transitions, 576 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-03 19:04:56,823 INFO L231 Difference]: Finished difference. Result has 66 places, 70 transitions, 408 flow [2024-06-03 19:04:56,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=408, PETRI_PLACES=66, PETRI_TRANSITIONS=70} [2024-06-03 19:04:56,824 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 22 predicate places. [2024-06-03 19:04:56,824 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 70 transitions, 408 flow [2024-06-03 19:04:56,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:04:56,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:04:56,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:04:56,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 19:04:56,825 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:04:56,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:04:56,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1977020806, now seen corresponding path program 2 times [2024-06-03 19:04:56,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:04:56,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387041214] [2024-06-03 19:04:56,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:04:56,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:04:56,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:04:57,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:04:57,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:04:57,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387041214] [2024-06-03 19:04:57,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387041214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:04:57,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:04:57,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:04:57,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435451450] [2024-06-03 19:04:57,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:04:57,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:04:57,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:04:57,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:04:57,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:04:57,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:04:57,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 70 transitions, 408 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:04:57,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:04:57,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:04:57,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:04:58,212 INFO L124 PetriNetUnfolderBase]: 1594/2428 cut-off events. [2024-06-03 19:04:58,213 INFO L125 PetriNetUnfolderBase]: For 10556/10560 co-relation queries the response was YES. [2024-06-03 19:04:58,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9162 conditions, 2428 events. 1594/2428 cut-off events. For 10556/10560 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11754 event pairs, 631 based on Foata normal form. 6/2433 useless extension candidates. Maximal degree in co-relation 9135. Up to 2293 conditions per place. [2024-06-03 19:04:58,227 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 67 selfloop transitions, 26 changer transitions 0/98 dead transitions. [2024-06-03 19:04:58,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 98 transitions, 706 flow [2024-06-03 19:04:58,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:04:58,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:04:58,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-03 19:04:58,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45514950166112955 [2024-06-03 19:04:58,228 INFO L175 Difference]: Start difference. First operand has 66 places, 70 transitions, 408 flow. Second operand 7 states and 137 transitions. [2024-06-03 19:04:58,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 98 transitions, 706 flow [2024-06-03 19:04:58,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 98 transitions, 664 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-03 19:04:58,235 INFO L231 Difference]: Finished difference. Result has 70 places, 73 transitions, 467 flow [2024-06-03 19:04:58,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=467, PETRI_PLACES=70, PETRI_TRANSITIONS=73} [2024-06-03 19:04:58,236 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 26 predicate places. [2024-06-03 19:04:58,237 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 73 transitions, 467 flow [2024-06-03 19:04:58,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:04:58,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:04:58,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:04:58,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 19:04:58,237 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:04:58,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:04:58,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1977016156, now seen corresponding path program 3 times [2024-06-03 19:04:58,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:04:58,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379374589] [2024-06-03 19:04:58,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:04:58,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:04:58,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:04:58,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:04:58,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:04:58,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379374589] [2024-06-03 19:04:58,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379374589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:04:58,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:04:58,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:04:58,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543971342] [2024-06-03 19:04:58,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:04:58,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:04:58,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:04:58,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:04:58,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:04:59,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:04:59,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 73 transitions, 467 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:04:59,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:04:59,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:04:59,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:04:59,678 INFO L124 PetriNetUnfolderBase]: 1605/2452 cut-off events. [2024-06-03 19:04:59,678 INFO L125 PetriNetUnfolderBase]: For 13822/13828 co-relation queries the response was YES. [2024-06-03 19:04:59,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9832 conditions, 2452 events. 1605/2452 cut-off events. For 13822/13828 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11924 event pairs, 639 based on Foata normal form. 6/2457 useless extension candidates. Maximal degree in co-relation 9804. Up to 2257 conditions per place. [2024-06-03 19:04:59,692 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 60 selfloop transitions, 37 changer transitions 0/102 dead transitions. [2024-06-03 19:04:59,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 102 transitions, 837 flow [2024-06-03 19:04:59,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:04:59,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:04:59,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-03 19:04:59,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-03 19:04:59,693 INFO L175 Difference]: Start difference. First operand has 70 places, 73 transitions, 467 flow. Second operand 7 states and 140 transitions. [2024-06-03 19:04:59,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 102 transitions, 837 flow [2024-06-03 19:04:59,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 102 transitions, 750 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-03 19:04:59,702 INFO L231 Difference]: Finished difference. Result has 72 places, 79 transitions, 544 flow [2024-06-03 19:04:59,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=544, PETRI_PLACES=72, PETRI_TRANSITIONS=79} [2024-06-03 19:04:59,703 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 28 predicate places. [2024-06-03 19:04:59,703 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 79 transitions, 544 flow [2024-06-03 19:04:59,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:04:59,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:04:59,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:04:59,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 19:04:59,704 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:04:59,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:04:59,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1806313540, now seen corresponding path program 1 times [2024-06-03 19:04:59,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:04:59,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016261016] [2024-06-03 19:04:59,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:04:59,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:04:59,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:05:00,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:05:00,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:05:00,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016261016] [2024-06-03 19:05:00,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016261016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:05:00,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:05:00,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:05:00,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852443509] [2024-06-03 19:05:00,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:05:00,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:05:00,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:05:00,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:05:00,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:05:00,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:05:00,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 79 transitions, 544 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:00,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:05:00,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:05:00,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:05:01,168 INFO L124 PetriNetUnfolderBase]: 1627/2486 cut-off events. [2024-06-03 19:05:01,168 INFO L125 PetriNetUnfolderBase]: For 14112/14116 co-relation queries the response was YES. [2024-06-03 19:05:01,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9964 conditions, 2486 events. 1627/2486 cut-off events. For 14112/14116 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12140 event pairs, 583 based on Foata normal form. 8/2491 useless extension candidates. Maximal degree in co-relation 9935. Up to 2293 conditions per place. [2024-06-03 19:05:01,183 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 82 selfloop transitions, 26 changer transitions 0/113 dead transitions. [2024-06-03 19:05:01,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 113 transitions, 934 flow [2024-06-03 19:05:01,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:05:01,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:05:01,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-03 19:05:01,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4750830564784053 [2024-06-03 19:05:01,184 INFO L175 Difference]: Start difference. First operand has 72 places, 79 transitions, 544 flow. Second operand 7 states and 143 transitions. [2024-06-03 19:05:01,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 113 transitions, 934 flow [2024-06-03 19:05:01,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 113 transitions, 888 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-03 19:05:01,193 INFO L231 Difference]: Finished difference. Result has 76 places, 85 transitions, 616 flow [2024-06-03 19:05:01,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=616, PETRI_PLACES=76, PETRI_TRANSITIONS=85} [2024-06-03 19:05:01,194 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 32 predicate places. [2024-06-03 19:05:01,194 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 85 transitions, 616 flow [2024-06-03 19:05:01,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:01,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:05:01,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:05:01,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 19:05:01,195 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:05:01,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:05:01,195 INFO L85 PathProgramCache]: Analyzing trace with hash 277085658, now seen corresponding path program 2 times [2024-06-03 19:05:01,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:05:01,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397990724] [2024-06-03 19:05:01,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:05:01,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:05:01,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:05:01,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:05:01,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:05:01,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397990724] [2024-06-03 19:05:01,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397990724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:05:01,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:05:01,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:05:01,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060740167] [2024-06-03 19:05:01,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:05:01,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:05:01,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:05:01,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:05:01,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:05:02,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:05:02,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 85 transitions, 616 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:02,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:05:02,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:05:02,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:05:02,653 INFO L124 PetriNetUnfolderBase]: 1649/2524 cut-off events. [2024-06-03 19:05:02,653 INFO L125 PetriNetUnfolderBase]: For 17177/17185 co-relation queries the response was YES. [2024-06-03 19:05:02,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10701 conditions, 2524 events. 1649/2524 cut-off events. For 17177/17185 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12371 event pairs, 578 based on Foata normal form. 12/2535 useless extension candidates. Maximal degree in co-relation 10670. Up to 2312 conditions per place. [2024-06-03 19:05:02,666 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 78 selfloop transitions, 30 changer transitions 0/113 dead transitions. [2024-06-03 19:05:02,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 113 transitions, 982 flow [2024-06-03 19:05:02,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:05:02,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:05:02,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-03 19:05:02,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-03 19:05:02,668 INFO L175 Difference]: Start difference. First operand has 76 places, 85 transitions, 616 flow. Second operand 7 states and 138 transitions. [2024-06-03 19:05:02,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 113 transitions, 982 flow [2024-06-03 19:05:02,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 113 transitions, 947 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-03 19:05:02,679 INFO L231 Difference]: Finished difference. Result has 80 places, 88 transitions, 681 flow [2024-06-03 19:05:02,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=581, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=681, PETRI_PLACES=80, PETRI_TRANSITIONS=88} [2024-06-03 19:05:02,680 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 36 predicate places. [2024-06-03 19:05:02,680 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 88 transitions, 681 flow [2024-06-03 19:05:02,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:02,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:05:02,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:05:02,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 19:05:02,681 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:05:02,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:05:02,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1935414916, now seen corresponding path program 4 times [2024-06-03 19:05:02,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:05:02,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827617978] [2024-06-03 19:05:02,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:05:02,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:05:02,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:05:03,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:05:03,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:05:03,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827617978] [2024-06-03 19:05:03,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827617978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:05:03,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:05:03,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:05:03,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211171863] [2024-06-03 19:05:03,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:05:03,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:05:03,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:05:03,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:05:03,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:05:03,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:05:03,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 88 transitions, 681 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:03,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:05:03,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:05:03,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:05:04,045 INFO L124 PetriNetUnfolderBase]: 1644/2514 cut-off events. [2024-06-03 19:05:04,045 INFO L125 PetriNetUnfolderBase]: For 19500/19504 co-relation queries the response was YES. [2024-06-03 19:05:04,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10976 conditions, 2514 events. 1644/2514 cut-off events. For 19500/19504 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12240 event pairs, 628 based on Foata normal form. 2/2514 useless extension candidates. Maximal degree in co-relation 10943. Up to 2316 conditions per place. [2024-06-03 19:05:04,061 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 65 selfloop transitions, 37 changer transitions 0/107 dead transitions. [2024-06-03 19:05:04,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 107 transitions, 943 flow [2024-06-03 19:05:04,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:05:04,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:05:04,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-03 19:05:04,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485049833887043 [2024-06-03 19:05:04,073 INFO L175 Difference]: Start difference. First operand has 80 places, 88 transitions, 681 flow. Second operand 7 states and 135 transitions. [2024-06-03 19:05:04,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 107 transitions, 943 flow [2024-06-03 19:05:04,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 107 transitions, 857 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-03 19:05:04,085 INFO L231 Difference]: Finished difference. Result has 83 places, 88 transitions, 677 flow [2024-06-03 19:05:04,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=595, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=677, PETRI_PLACES=83, PETRI_TRANSITIONS=88} [2024-06-03 19:05:04,086 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 39 predicate places. [2024-06-03 19:05:04,086 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 88 transitions, 677 flow [2024-06-03 19:05:04,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:04,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:05:04,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:05:04,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 19:05:04,087 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:05:04,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:05:04,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1935414730, now seen corresponding path program 3 times [2024-06-03 19:05:04,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:05:04,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932204289] [2024-06-03 19:05:04,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:05:04,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:05:04,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:05:04,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:05:04,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:05:04,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932204289] [2024-06-03 19:05:04,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932204289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:05:04,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:05:04,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:05:04,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804827311] [2024-06-03 19:05:04,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:05:04,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:05:04,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:05:04,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:05:04,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:05:04,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:05:04,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 88 transitions, 677 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:04,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:05:04,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:05:04,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:05:05,456 INFO L124 PetriNetUnfolderBase]: 1634/2503 cut-off events. [2024-06-03 19:05:05,457 INFO L125 PetriNetUnfolderBase]: For 21703/21711 co-relation queries the response was YES. [2024-06-03 19:05:05,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11032 conditions, 2503 events. 1634/2503 cut-off events. For 21703/21711 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12264 event pairs, 576 based on Foata normal form. 12/2514 useless extension candidates. Maximal degree in co-relation 10998. Up to 2297 conditions per place. [2024-06-03 19:05:05,469 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 78 selfloop transitions, 29 changer transitions 0/112 dead transitions. [2024-06-03 19:05:05,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 112 transitions, 967 flow [2024-06-03 19:05:05,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:05:05,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:05:05,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-03 19:05:05,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4584717607973422 [2024-06-03 19:05:05,471 INFO L175 Difference]: Start difference. First operand has 83 places, 88 transitions, 677 flow. Second operand 7 states and 138 transitions. [2024-06-03 19:05:05,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 112 transitions, 967 flow [2024-06-03 19:05:05,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 112 transitions, 855 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-03 19:05:05,486 INFO L231 Difference]: Finished difference. Result has 84 places, 88 transitions, 631 flow [2024-06-03 19:05:05,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=565, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=631, PETRI_PLACES=84, PETRI_TRANSITIONS=88} [2024-06-03 19:05:05,487 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 40 predicate places. [2024-06-03 19:05:05,487 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 88 transitions, 631 flow [2024-06-03 19:05:05,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:05,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:05:05,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:05:05,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 19:05:05,488 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:05:05,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:05:05,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1508595408, now seen corresponding path program 1 times [2024-06-03 19:05:05,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:05:05,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971557347] [2024-06-03 19:05:05,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:05:05,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:05:05,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:05:06,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:05:06,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:05:06,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971557347] [2024-06-03 19:05:06,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971557347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:05:06,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:05:06,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:05:06,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619825455] [2024-06-03 19:05:06,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:05:06,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:05:06,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:05:06,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:05:06,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:05:06,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-03 19:05:06,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 88 transitions, 631 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:06,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:05:06,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-03 19:05:06,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:05:06,636 INFO L124 PetriNetUnfolderBase]: 1224/2069 cut-off events. [2024-06-03 19:05:06,636 INFO L125 PetriNetUnfolderBase]: For 19288/19298 co-relation queries the response was YES. [2024-06-03 19:05:06,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8978 conditions, 2069 events. 1224/2069 cut-off events. For 19288/19298 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 11212 event pairs, 491 based on Foata normal form. 9/2075 useless extension candidates. Maximal degree in co-relation 8943. Up to 1792 conditions per place. [2024-06-03 19:05:06,647 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 68 selfloop transitions, 10 changer transitions 0/100 dead transitions. [2024-06-03 19:05:06,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 100 transitions, 838 flow [2024-06-03 19:05:06,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:05:06,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:05:06,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-03 19:05:06,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46124031007751937 [2024-06-03 19:05:06,648 INFO L175 Difference]: Start difference. First operand has 84 places, 88 transitions, 631 flow. Second operand 6 states and 119 transitions. [2024-06-03 19:05:06,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 100 transitions, 838 flow [2024-06-03 19:05:06,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 100 transitions, 754 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-03 19:05:06,657 INFO L231 Difference]: Finished difference. Result has 84 places, 93 transitions, 615 flow [2024-06-03 19:05:06,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=615, PETRI_PLACES=84, PETRI_TRANSITIONS=93} [2024-06-03 19:05:06,658 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 40 predicate places. [2024-06-03 19:05:06,658 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 93 transitions, 615 flow [2024-06-03 19:05:06,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:06,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:05:06,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:05:06,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 19:05:06,659 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:05:06,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:05:06,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1158101300, now seen corresponding path program 1 times [2024-06-03 19:05:06,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:05:06,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514244848] [2024-06-03 19:05:06,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:05:06,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:05:06,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:05:07,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:05:07,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:05:07,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514244848] [2024-06-03 19:05:07,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514244848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:05:07,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:05:07,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:05:07,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651720808] [2024-06-03 19:05:07,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:05:07,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:05:07,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:05:07,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:05:07,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:05:07,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:05:07,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 93 transitions, 615 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:07,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:05:07,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:05:07,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:05:08,246 INFO L124 PetriNetUnfolderBase]: 1653/2532 cut-off events. [2024-06-03 19:05:08,247 INFO L125 PetriNetUnfolderBase]: For 26420/26424 co-relation queries the response was YES. [2024-06-03 19:05:08,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11688 conditions, 2532 events. 1653/2532 cut-off events. For 26420/26424 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12365 event pairs, 599 based on Foata normal form. 8/2539 useless extension candidates. Maximal degree in co-relation 11651. Up to 2357 conditions per place. [2024-06-03 19:05:08,259 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 90 selfloop transitions, 30 changer transitions 0/125 dead transitions. [2024-06-03 19:05:08,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 125 transitions, 981 flow [2024-06-03 19:05:08,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:05:08,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:05:08,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-03 19:05:08,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-03 19:05:08,261 INFO L175 Difference]: Start difference. First operand has 84 places, 93 transitions, 615 flow. Second operand 8 states and 155 transitions. [2024-06-03 19:05:08,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 125 transitions, 981 flow [2024-06-03 19:05:08,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 125 transitions, 953 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-03 19:05:08,276 INFO L231 Difference]: Finished difference. Result has 89 places, 96 transitions, 696 flow [2024-06-03 19:05:08,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=587, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=696, PETRI_PLACES=89, PETRI_TRANSITIONS=96} [2024-06-03 19:05:08,277 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 45 predicate places. [2024-06-03 19:05:08,277 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 96 transitions, 696 flow [2024-06-03 19:05:08,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:08,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:05:08,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:05:08,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 19:05:08,279 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:05:08,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:05:08,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1728769008, now seen corresponding path program 2 times [2024-06-03 19:05:08,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:05:08,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095015998] [2024-06-03 19:05:08,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:05:08,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:05:08,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:05:09,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:05:09,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:05:09,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095015998] [2024-06-03 19:05:09,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095015998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:05:09,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:05:09,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:05:09,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313536637] [2024-06-03 19:05:09,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:05:09,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:05:09,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:05:09,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:05:09,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:05:09,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:05:09,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 96 transitions, 696 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:09,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:05:09,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:05:09,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:05:09,932 INFO L124 PetriNetUnfolderBase]: 1707/2631 cut-off events. [2024-06-03 19:05:09,933 INFO L125 PetriNetUnfolderBase]: For 31471/31473 co-relation queries the response was YES. [2024-06-03 19:05:09,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12798 conditions, 2631 events. 1707/2631 cut-off events. For 31471/31473 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 13041 event pairs, 544 based on Foata normal form. 4/2632 useless extension candidates. Maximal degree in co-relation 12760. Up to 2217 conditions per place. [2024-06-03 19:05:09,948 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 79 selfloop transitions, 54 changer transitions 0/138 dead transitions. [2024-06-03 19:05:09,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 138 transitions, 1288 flow [2024-06-03 19:05:09,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:05:09,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:05:09,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-03 19:05:09,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-03 19:05:09,951 INFO L175 Difference]: Start difference. First operand has 89 places, 96 transitions, 696 flow. Second operand 8 states and 168 transitions. [2024-06-03 19:05:09,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 138 transitions, 1288 flow [2024-06-03 19:05:09,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 138 transitions, 1205 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-03 19:05:09,970 INFO L231 Difference]: Finished difference. Result has 91 places, 105 transitions, 855 flow [2024-06-03 19:05:09,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=613, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=855, PETRI_PLACES=91, PETRI_TRANSITIONS=105} [2024-06-03 19:05:09,970 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 47 predicate places. [2024-06-03 19:05:09,970 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 105 transitions, 855 flow [2024-06-03 19:05:09,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:09,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:05:09,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:05:09,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 19:05:09,971 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:05:09,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:05:09,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1157951570, now seen corresponding path program 3 times [2024-06-03 19:05:09,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:05:09,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786835045] [2024-06-03 19:05:09,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:05:09,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:05:09,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:05:10,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:05:10,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:05:10,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786835045] [2024-06-03 19:05:10,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786835045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:05:10,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:05:10,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:05:10,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936825061] [2024-06-03 19:05:10,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:05:10,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:05:10,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:05:10,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:05:10,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:05:10,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:05:10,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 105 transitions, 855 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:10,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:05:10,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:05:10,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:05:11,671 INFO L124 PetriNetUnfolderBase]: 1697/2617 cut-off events. [2024-06-03 19:05:11,671 INFO L125 PetriNetUnfolderBase]: For 35848/35850 co-relation queries the response was YES. [2024-06-03 19:05:11,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13240 conditions, 2617 events. 1697/2617 cut-off events. For 35848/35850 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 13002 event pairs, 551 based on Foata normal form. 4/2618 useless extension candidates. Maximal degree in co-relation 13201. Up to 2209 conditions per place. [2024-06-03 19:05:11,684 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 74 selfloop transitions, 56 changer transitions 0/135 dead transitions. [2024-06-03 19:05:11,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 135 transitions, 1261 flow [2024-06-03 19:05:11,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:05:11,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:05:11,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-03 19:05:11,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-03 19:05:11,686 INFO L175 Difference]: Start difference. First operand has 91 places, 105 transitions, 855 flow. Second operand 8 states and 164 transitions. [2024-06-03 19:05:11,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 135 transitions, 1261 flow [2024-06-03 19:05:11,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 135 transitions, 1169 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-03 19:05:11,707 INFO L231 Difference]: Finished difference. Result has 96 places, 105 transitions, 883 flow [2024-06-03 19:05:11,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=763, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=883, PETRI_PLACES=96, PETRI_TRANSITIONS=105} [2024-06-03 19:05:11,707 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 52 predicate places. [2024-06-03 19:05:11,707 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 105 transitions, 883 flow [2024-06-03 19:05:11,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:11,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:05:11,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:05:11,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 19:05:11,708 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:05:11,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:05:11,708 INFO L85 PathProgramCache]: Analyzing trace with hash -7629488, now seen corresponding path program 4 times [2024-06-03 19:05:11,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:05:11,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389064850] [2024-06-03 19:05:11,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:05:11,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:05:11,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:05:12,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:05:12,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:05:12,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389064850] [2024-06-03 19:05:12,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389064850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:05:12,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:05:12,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:05:12,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400319256] [2024-06-03 19:05:12,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:05:12,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:05:12,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:05:12,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:05:12,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:05:12,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:05:12,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 105 transitions, 883 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:12,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:05:12,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:05:12,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:05:13,257 INFO L124 PetriNetUnfolderBase]: 1751/2709 cut-off events. [2024-06-03 19:05:13,257 INFO L125 PetriNetUnfolderBase]: For 40928/40930 co-relation queries the response was YES. [2024-06-03 19:05:13,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14111 conditions, 2709 events. 1751/2709 cut-off events. For 40928/40930 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 13582 event pairs, 549 based on Foata normal form. 4/2711 useless extension candidates. Maximal degree in co-relation 14070. Up to 2255 conditions per place. [2024-06-03 19:05:13,270 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 77 selfloop transitions, 59 changer transitions 0/141 dead transitions. [2024-06-03 19:05:13,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 141 transitions, 1473 flow [2024-06-03 19:05:13,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:05:13,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:05:13,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-03 19:05:13,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-03 19:05:13,272 INFO L175 Difference]: Start difference. First operand has 96 places, 105 transitions, 883 flow. Second operand 8 states and 164 transitions. [2024-06-03 19:05:13,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 141 transitions, 1473 flow [2024-06-03 19:05:13,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 141 transitions, 1341 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 19:05:13,290 INFO L231 Difference]: Finished difference. Result has 97 places, 111 transitions, 981 flow [2024-06-03 19:05:13,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=763, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=981, PETRI_PLACES=97, PETRI_TRANSITIONS=111} [2024-06-03 19:05:13,290 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 53 predicate places. [2024-06-03 19:05:13,290 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 111 transitions, 981 flow [2024-06-03 19:05:13,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:13,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:05:13,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:05:13,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 19:05:13,291 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:05:13,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:05:13,291 INFO L85 PathProgramCache]: Analyzing trace with hash 45509904, now seen corresponding path program 5 times [2024-06-03 19:05:13,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:05:13,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858132388] [2024-06-03 19:05:13,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:05:13,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:05:13,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:05:14,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:05:14,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:05:14,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858132388] [2024-06-03 19:05:14,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858132388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:05:14,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:05:14,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:05:14,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744842961] [2024-06-03 19:05:14,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:05:14,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:05:14,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:05:14,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:05:14,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:05:14,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:05:14,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 111 transitions, 981 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:14,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:05:14,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:05:14,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:05:14,827 INFO L124 PetriNetUnfolderBase]: 1741/2696 cut-off events. [2024-06-03 19:05:14,828 INFO L125 PetriNetUnfolderBase]: For 43957/43961 co-relation queries the response was YES. [2024-06-03 19:05:14,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14163 conditions, 2696 events. 1741/2696 cut-off events. For 43957/43961 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 13510 event pairs, 554 based on Foata normal form. 4/2698 useless extension candidates. Maximal degree in co-relation 14121. Up to 2247 conditions per place. [2024-06-03 19:05:14,843 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 70 selfloop transitions, 63 changer transitions 0/138 dead transitions. [2024-06-03 19:05:14,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 138 transitions, 1393 flow [2024-06-03 19:05:14,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:05:14,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:05:14,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-03 19:05:14,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622093023255814 [2024-06-03 19:05:14,845 INFO L175 Difference]: Start difference. First operand has 97 places, 111 transitions, 981 flow. Second operand 8 states and 159 transitions. [2024-06-03 19:05:14,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 138 transitions, 1393 flow [2024-06-03 19:05:14,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 138 transitions, 1202 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-03 19:05:14,874 INFO L231 Difference]: Finished difference. Result has 100 places, 111 transitions, 924 flow [2024-06-03 19:05:14,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=790, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=924, PETRI_PLACES=100, PETRI_TRANSITIONS=111} [2024-06-03 19:05:14,874 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 56 predicate places. [2024-06-03 19:05:14,875 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 111 transitions, 924 flow [2024-06-03 19:05:14,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:14,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:05:14,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:05:14,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 19:05:14,875 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:05:14,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:05:14,876 INFO L85 PathProgramCache]: Analyzing trace with hash 38152674, now seen corresponding path program 6 times [2024-06-03 19:05:14,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:05:14,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965059726] [2024-06-03 19:05:14,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:05:14,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:05:14,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:05:15,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:05:15,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:05:15,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965059726] [2024-06-03 19:05:15,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965059726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:05:15,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:05:15,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:05:15,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880297051] [2024-06-03 19:05:15,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:05:15,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:05:15,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:05:15,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:05:15,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:05:15,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:05:15,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 111 transitions, 924 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:15,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:05:15,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:05:15,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:05:16,425 INFO L124 PetriNetUnfolderBase]: 1731/2682 cut-off events. [2024-06-03 19:05:16,426 INFO L125 PetriNetUnfolderBase]: For 45947/45951 co-relation queries the response was YES. [2024-06-03 19:05:16,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14089 conditions, 2682 events. 1731/2682 cut-off events. For 45947/45951 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 13401 event pairs, 547 based on Foata normal form. 4/2684 useless extension candidates. Maximal degree in co-relation 14046. Up to 2239 conditions per place. [2024-06-03 19:05:16,441 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 72 selfloop transitions, 60 changer transitions 0/137 dead transitions. [2024-06-03 19:05:16,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 137 transitions, 1262 flow [2024-06-03 19:05:16,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:05:16,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:05:16,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-03 19:05:16,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4622093023255814 [2024-06-03 19:05:16,443 INFO L175 Difference]: Start difference. First operand has 100 places, 111 transitions, 924 flow. Second operand 8 states and 159 transitions. [2024-06-03 19:05:16,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 137 transitions, 1262 flow [2024-06-03 19:05:16,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 137 transitions, 1094 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-03 19:05:16,467 INFO L231 Difference]: Finished difference. Result has 101 places, 111 transitions, 884 flow [2024-06-03 19:05:16,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=884, PETRI_PLACES=101, PETRI_TRANSITIONS=111} [2024-06-03 19:05:16,468 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 57 predicate places. [2024-06-03 19:05:16,468 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 111 transitions, 884 flow [2024-06-03 19:05:16,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:16,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:05:16,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:05:16,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 19:05:16,468 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:05:16,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:05:16,469 INFO L85 PathProgramCache]: Analyzing trace with hash 45786951, now seen corresponding path program 1 times [2024-06-03 19:05:16,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:05:16,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669354438] [2024-06-03 19:05:16,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:05:16,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:05:16,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:05:17,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:05:17,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:05:17,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669354438] [2024-06-03 19:05:17,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669354438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:05:17,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:05:17,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:05:17,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152536237] [2024-06-03 19:05:17,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:05:17,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:05:17,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:05:17,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:05:17,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:05:17,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:05:17,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 111 transitions, 884 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:17,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:05:17,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:05:17,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:05:18,372 INFO L124 PetriNetUnfolderBase]: 1516/2443 cut-off events. [2024-06-03 19:05:18,372 INFO L125 PetriNetUnfolderBase]: For 41539/41541 co-relation queries the response was YES. [2024-06-03 19:05:18,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12568 conditions, 2443 events. 1516/2443 cut-off events. For 41539/41541 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 12597 event pairs, 475 based on Foata normal form. 4/2446 useless extension candidates. Maximal degree in co-relation 12524. Up to 2214 conditions per place. [2024-06-03 19:05:18,386 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 116 selfloop transitions, 17 changer transitions 0/139 dead transitions. [2024-06-03 19:05:18,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 139 transitions, 1270 flow [2024-06-03 19:05:18,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:05:18,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:05:18,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-03 19:05:18,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-03 19:05:18,388 INFO L175 Difference]: Start difference. First operand has 101 places, 111 transitions, 884 flow. Second operand 8 states and 155 transitions. [2024-06-03 19:05:18,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 139 transitions, 1270 flow [2024-06-03 19:05:18,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 139 transitions, 1138 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 19:05:18,411 INFO L231 Difference]: Finished difference. Result has 103 places, 116 transitions, 855 flow [2024-06-03 19:05:18,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=855, PETRI_PLACES=103, PETRI_TRANSITIONS=116} [2024-06-03 19:05:18,412 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 59 predicate places. [2024-06-03 19:05:18,412 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 116 transitions, 855 flow [2024-06-03 19:05:18,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:18,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:05:18,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:05:18,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 19:05:18,412 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:05:18,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:05:18,413 INFO L85 PathProgramCache]: Analyzing trace with hash -478181389, now seen corresponding path program 1 times [2024-06-03 19:05:18,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:05:18,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747541130] [2024-06-03 19:05:18,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:05:18,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:05:18,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:05:19,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:05:19,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:05:19,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747541130] [2024-06-03 19:05:19,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747541130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:05:19,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:05:19,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:05:19,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106630381] [2024-06-03 19:05:19,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:05:19,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:05:19,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:05:19,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:05:19,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:05:19,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-03 19:05:19,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 116 transitions, 855 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:19,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:05:19,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-03 19:05:19,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:05:19,875 INFO L124 PetriNetUnfolderBase]: 1274/2168 cut-off events. [2024-06-03 19:05:19,875 INFO L125 PetriNetUnfolderBase]: For 43472/43482 co-relation queries the response was YES. [2024-06-03 19:05:19,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11542 conditions, 2168 events. 1274/2168 cut-off events. For 43472/43482 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 11904 event pairs, 445 based on Foata normal form. 10/2154 useless extension candidates. Maximal degree in co-relation 11496. Up to 1866 conditions per place. [2024-06-03 19:05:19,889 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 94 selfloop transitions, 12 changer transitions 0/128 dead transitions. [2024-06-03 19:05:19,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 128 transitions, 1115 flow [2024-06-03 19:05:19,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:05:19,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:05:19,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-03 19:05:19,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-03 19:05:19,938 INFO L175 Difference]: Start difference. First operand has 103 places, 116 transitions, 855 flow. Second operand 6 states and 123 transitions. [2024-06-03 19:05:19,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 128 transitions, 1115 flow [2024-06-03 19:05:19,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 128 transitions, 1056 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-03 19:05:19,963 INFO L231 Difference]: Finished difference. Result has 104 places, 119 transitions, 856 flow [2024-06-03 19:05:19,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=796, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=856, PETRI_PLACES=104, PETRI_TRANSITIONS=119} [2024-06-03 19:05:19,964 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 60 predicate places. [2024-06-03 19:05:19,964 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 119 transitions, 856 flow [2024-06-03 19:05:19,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:19,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:05:19,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:05:19,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 19:05:19,965 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:05:19,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:05:19,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1655084799, now seen corresponding path program 1 times [2024-06-03 19:05:19,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:05:19,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281406107] [2024-06-03 19:05:19,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:05:19,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:05:19,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:05:20,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:05:20,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:05:20,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281406107] [2024-06-03 19:05:20,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281406107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:05:20,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:05:20,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:05:20,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827546788] [2024-06-03 19:05:20,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:05:20,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:05:20,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:05:20,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:05:20,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:05:20,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:05:21,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 119 transitions, 856 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:21,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:05:21,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:05:21,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:05:21,861 INFO L124 PetriNetUnfolderBase]: 1756/2721 cut-off events. [2024-06-03 19:05:21,861 INFO L125 PetriNetUnfolderBase]: For 57392/57396 co-relation queries the response was YES. [2024-06-03 19:05:21,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15050 conditions, 2721 events. 1756/2721 cut-off events. For 57392/57396 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 13596 event pairs, 386 based on Foata normal form. 8/2728 useless extension candidates. Maximal degree in co-relation 15003. Up to 2442 conditions per place. [2024-06-03 19:05:21,882 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 121 selfloop transitions, 33 changer transitions 0/159 dead transitions. [2024-06-03 19:05:21,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 159 transitions, 1430 flow [2024-06-03 19:05:21,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:05:21,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:05:21,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-03 19:05:21,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-03 19:05:21,884 INFO L175 Difference]: Start difference. First operand has 104 places, 119 transitions, 856 flow. Second operand 9 states and 174 transitions. [2024-06-03 19:05:21,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 159 transitions, 1430 flow [2024-06-03 19:05:21,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 159 transitions, 1392 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-03 19:05:21,920 INFO L231 Difference]: Finished difference. Result has 109 places, 123 transitions, 967 flow [2024-06-03 19:05:21,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=818, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=967, PETRI_PLACES=109, PETRI_TRANSITIONS=123} [2024-06-03 19:05:21,920 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 65 predicate places. [2024-06-03 19:05:21,921 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 123 transitions, 967 flow [2024-06-03 19:05:21,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:21,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:05:21,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:05:21,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 19:05:21,922 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:05:21,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:05:21,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1541405319, now seen corresponding path program 2 times [2024-06-03 19:05:21,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:05:21,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117663767] [2024-06-03 19:05:21,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:05:21,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:05:21,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:05:22,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:05:22,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:05:22,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117663767] [2024-06-03 19:05:22,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117663767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:05:22,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:05:22,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:05:22,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295887481] [2024-06-03 19:05:22,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:05:22,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:05:22,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:05:22,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:05:22,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:05:22,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:05:22,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 123 transitions, 967 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:22,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:05:22,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:05:22,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:05:23,619 INFO L124 PetriNetUnfolderBase]: 1748/2709 cut-off events. [2024-06-03 19:05:23,619 INFO L125 PetriNetUnfolderBase]: For 61795/61799 co-relation queries the response was YES. [2024-06-03 19:05:23,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15330 conditions, 2709 events. 1748/2709 cut-off events. For 61795/61799 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 13510 event pairs, 525 based on Foata normal form. 8/2716 useless extension candidates. Maximal degree in co-relation 15282. Up to 2501 conditions per place. [2024-06-03 19:05:23,636 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 118 selfloop transitions, 29 changer transitions 0/152 dead transitions. [2024-06-03 19:05:23,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 152 transitions, 1353 flow [2024-06-03 19:05:23,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:05:23,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:05:23,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-03 19:05:23,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-03 19:05:23,638 INFO L175 Difference]: Start difference. First operand has 109 places, 123 transitions, 967 flow. Second operand 8 states and 154 transitions. [2024-06-03 19:05:23,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 152 transitions, 1353 flow [2024-06-03 19:05:23,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 152 transitions, 1256 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-03 19:05:23,668 INFO L231 Difference]: Finished difference. Result has 112 places, 123 transitions, 936 flow [2024-06-03 19:05:23,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=870, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=936, PETRI_PLACES=112, PETRI_TRANSITIONS=123} [2024-06-03 19:05:23,669 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 68 predicate places. [2024-06-03 19:05:23,670 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 123 transitions, 936 flow [2024-06-03 19:05:23,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:23,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:05:23,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:05:23,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 19:05:23,670 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:05:23,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:05:23,671 INFO L85 PathProgramCache]: Analyzing trace with hash -2052235083, now seen corresponding path program 3 times [2024-06-03 19:05:23,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:05:23,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484935918] [2024-06-03 19:05:23,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:05:23,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:05:23,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:05:24,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:05:24,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:05:24,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484935918] [2024-06-03 19:05:24,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484935918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:05:24,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:05:24,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:05:24,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282415324] [2024-06-03 19:05:24,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:05:24,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:05:24,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:05:24,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:05:24,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:05:24,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:05:24,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 123 transitions, 936 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:24,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:05:24,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:05:24,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:05:25,466 INFO L124 PetriNetUnfolderBase]: 1765/2735 cut-off events. [2024-06-03 19:05:25,467 INFO L125 PetriNetUnfolderBase]: For 67113/67117 co-relation queries the response was YES. [2024-06-03 19:05:25,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15624 conditions, 2735 events. 1765/2735 cut-off events. For 67113/67117 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 13699 event pairs, 533 based on Foata normal form. 6/2740 useless extension candidates. Maximal degree in co-relation 15574. Up to 2483 conditions per place. [2024-06-03 19:05:25,488 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 105 selfloop transitions, 40 changer transitions 0/150 dead transitions. [2024-06-03 19:05:25,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 150 transitions, 1340 flow [2024-06-03 19:05:25,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:05:25,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:05:25,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-03 19:05:25,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-03 19:05:25,490 INFO L175 Difference]: Start difference. First operand has 112 places, 123 transitions, 936 flow. Second operand 8 states and 155 transitions. [2024-06-03 19:05:25,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 150 transitions, 1340 flow [2024-06-03 19:05:25,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 150 transitions, 1275 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-03 19:05:25,529 INFO L231 Difference]: Finished difference. Result has 113 places, 125 transitions, 1002 flow [2024-06-03 19:05:25,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=871, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1002, PETRI_PLACES=113, PETRI_TRANSITIONS=125} [2024-06-03 19:05:25,530 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 69 predicate places. [2024-06-03 19:05:25,530 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 125 transitions, 1002 flow [2024-06-03 19:05:25,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:25,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:05:25,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:05:25,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 19:05:25,531 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:05:25,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:05:25,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1951114961, now seen corresponding path program 1 times [2024-06-03 19:05:25,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:05:25,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487491719] [2024-06-03 19:05:25,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:05:25,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:05:25,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:05:26,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:05:26,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:05:26,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487491719] [2024-06-03 19:05:26,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487491719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:05:26,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:05:26,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:05:26,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570431788] [2024-06-03 19:05:26,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:05:26,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:05:26,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:05:26,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:05:26,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:05:26,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-03 19:05:26,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 125 transitions, 1002 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:26,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:05:26,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-03 19:05:26,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:05:26,852 INFO L124 PetriNetUnfolderBase]: 1496/2444 cut-off events. [2024-06-03 19:05:26,852 INFO L125 PetriNetUnfolderBase]: For 70413/70429 co-relation queries the response was YES. [2024-06-03 19:05:26,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14507 conditions, 2444 events. 1496/2444 cut-off events. For 70413/70429 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 13155 event pairs, 508 based on Foata normal form. 10/2436 useless extension candidates. Maximal degree in co-relation 14456. Up to 2151 conditions per place. [2024-06-03 19:05:26,868 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 95 selfloop transitions, 22 changer transitions 0/141 dead transitions. [2024-06-03 19:05:26,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 141 transitions, 1302 flow [2024-06-03 19:05:26,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:05:26,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:05:26,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-03 19:05:26,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-03 19:05:26,869 INFO L175 Difference]: Start difference. First operand has 113 places, 125 transitions, 1002 flow. Second operand 6 states and 123 transitions. [2024-06-03 19:05:26,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 141 transitions, 1302 flow [2024-06-03 19:05:26,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 141 transitions, 1189 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-03 19:05:26,903 INFO L231 Difference]: Finished difference. Result has 113 places, 128 transitions, 977 flow [2024-06-03 19:05:26,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=889, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=977, PETRI_PLACES=113, PETRI_TRANSITIONS=128} [2024-06-03 19:05:26,904 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 69 predicate places. [2024-06-03 19:05:26,904 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 128 transitions, 977 flow [2024-06-03 19:05:26,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:26,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:05:26,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:05:26,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 19:05:26,905 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:05:26,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:05:26,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1529224891, now seen corresponding path program 4 times [2024-06-03 19:05:26,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:05:26,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989181803] [2024-06-03 19:05:26,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:05:26,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:05:26,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:05:27,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:05:27,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:05:27,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989181803] [2024-06-03 19:05:27,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989181803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:05:27,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:05:27,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:05:27,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627672893] [2024-06-03 19:05:27,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:05:27,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:05:27,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:05:27,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:05:27,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:05:27,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:05:27,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 128 transitions, 977 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:27,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:05:27,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:05:27,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:05:28,491 INFO L124 PetriNetUnfolderBase]: 1767/2739 cut-off events. [2024-06-03 19:05:28,491 INFO L125 PetriNetUnfolderBase]: For 76106/76110 co-relation queries the response was YES. [2024-06-03 19:05:28,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16208 conditions, 2739 events. 1767/2739 cut-off events. For 76106/76110 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 13716 event pairs, 536 based on Foata normal form. 4/2741 useless extension candidates. Maximal degree in co-relation 16156. Up to 2485 conditions per place. [2024-06-03 19:05:28,509 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 109 selfloop transitions, 39 changer transitions 0/153 dead transitions. [2024-06-03 19:05:28,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 153 transitions, 1385 flow [2024-06-03 19:05:28,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:05:28,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:05:28,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-03 19:05:28,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-03 19:05:28,511 INFO L175 Difference]: Start difference. First operand has 113 places, 128 transitions, 977 flow. Second operand 8 states and 152 transitions. [2024-06-03 19:05:28,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 153 transitions, 1385 flow [2024-06-03 19:05:28,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 153 transitions, 1327 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-03 19:05:28,552 INFO L231 Difference]: Finished difference. Result has 117 places, 130 transitions, 1052 flow [2024-06-03 19:05:28,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=919, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1052, PETRI_PLACES=117, PETRI_TRANSITIONS=130} [2024-06-03 19:05:28,556 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 73 predicate places. [2024-06-03 19:05:28,556 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 130 transitions, 1052 flow [2024-06-03 19:05:28,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:28,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:05:28,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:05:28,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 19:05:28,557 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:05:28,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:05:28,557 INFO L85 PathProgramCache]: Analyzing trace with hash -553453301, now seen corresponding path program 2 times [2024-06-03 19:05:28,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:05:28,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347971605] [2024-06-03 19:05:28,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:05:28,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:05:28,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:05:29,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:05:29,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:05:29,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347971605] [2024-06-03 19:05:29,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347971605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:05:29,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:05:29,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:05:29,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037729684] [2024-06-03 19:05:29,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:05:29,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:05:29,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:05:29,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:05:29,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:05:29,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-03 19:05:29,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 130 transitions, 1052 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:29,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:05:29,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-03 19:05:29,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:05:29,860 INFO L124 PetriNetUnfolderBase]: 1485/2420 cut-off events. [2024-06-03 19:05:29,860 INFO L125 PetriNetUnfolderBase]: For 78395/78403 co-relation queries the response was YES. [2024-06-03 19:05:29,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14917 conditions, 2420 events. 1485/2420 cut-off events. For 78395/78403 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 12876 event pairs, 511 based on Foata normal form. 8/2405 useless extension candidates. Maximal degree in co-relation 14864. Up to 2133 conditions per place. [2024-06-03 19:05:29,877 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 90 selfloop transitions, 26 changer transitions 0/141 dead transitions. [2024-06-03 19:05:29,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 141 transitions, 1340 flow [2024-06-03 19:05:29,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:05:29,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:05:29,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-03 19:05:29,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46124031007751937 [2024-06-03 19:05:29,879 INFO L175 Difference]: Start difference. First operand has 117 places, 130 transitions, 1052 flow. Second operand 6 states and 119 transitions. [2024-06-03 19:05:29,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 141 transitions, 1340 flow [2024-06-03 19:05:29,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 141 transitions, 1225 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-03 19:05:29,915 INFO L231 Difference]: Finished difference. Result has 117 places, 133 transitions, 1035 flow [2024-06-03 19:05:29,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=937, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1035, PETRI_PLACES=117, PETRI_TRANSITIONS=133} [2024-06-03 19:05:29,917 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 73 predicate places. [2024-06-03 19:05:29,917 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 133 transitions, 1035 flow [2024-06-03 19:05:29,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:29,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:05:29,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:05:29,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 19:05:29,918 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:05:29,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:05:29,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1945395089, now seen corresponding path program 1 times [2024-06-03 19:05:29,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:05:29,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587743973] [2024-06-03 19:05:29,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:05:29,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:05:29,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:05:30,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:05:30,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:05:30,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587743973] [2024-06-03 19:05:30,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587743973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:05:30,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:05:30,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:05:30,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713519539] [2024-06-03 19:05:30,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:05:30,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:05:30,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:05:30,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:05:30,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:05:30,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:05:30,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 133 transitions, 1035 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:30,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:05:30,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:05:30,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:05:31,318 INFO L124 PetriNetUnfolderBase]: 1562/2517 cut-off events. [2024-06-03 19:05:31,318 INFO L125 PetriNetUnfolderBase]: For 72007/72009 co-relation queries the response was YES. [2024-06-03 19:05:31,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14997 conditions, 2517 events. 1562/2517 cut-off events. For 72007/72009 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 13071 event pairs, 447 based on Foata normal form. 1/2517 useless extension candidates. Maximal degree in co-relation 14943. Up to 2321 conditions per place. [2024-06-03 19:05:31,336 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 128 selfloop transitions, 13 changer transitions 0/147 dead transitions. [2024-06-03 19:05:31,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 147 transitions, 1387 flow [2024-06-03 19:05:31,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:05:31,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:05:31,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-03 19:05:31,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2024-06-03 19:05:31,337 INFO L175 Difference]: Start difference. First operand has 117 places, 133 transitions, 1035 flow. Second operand 7 states and 127 transitions. [2024-06-03 19:05:31,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 147 transitions, 1387 flow [2024-06-03 19:05:31,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 147 transitions, 1311 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-03 19:05:31,370 INFO L231 Difference]: Finished difference. Result has 120 places, 136 transitions, 1035 flow [2024-06-03 19:05:31,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=959, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1035, PETRI_PLACES=120, PETRI_TRANSITIONS=136} [2024-06-03 19:05:31,371 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 76 predicate places. [2024-06-03 19:05:31,371 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 136 transitions, 1035 flow [2024-06-03 19:05:31,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:31,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:05:31,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:05:31,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 19:05:31,372 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:05:31,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:05:31,372 INFO L85 PathProgramCache]: Analyzing trace with hash -553447349, now seen corresponding path program 2 times [2024-06-03 19:05:31,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:05:31,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755541871] [2024-06-03 19:05:31,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:05:31,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:05:31,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:05:32,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:05:32,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:05:32,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755541871] [2024-06-03 19:05:32,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755541871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:05:32,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:05:32,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:05:32,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102020015] [2024-06-03 19:05:32,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:05:32,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:05:32,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:05:32,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:05:32,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:05:32,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:05:32,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 136 transitions, 1035 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:32,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:05:32,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:05:32,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:05:32,621 INFO L124 PetriNetUnfolderBase]: 1559/2514 cut-off events. [2024-06-03 19:05:32,621 INFO L125 PetriNetUnfolderBase]: For 75902/75906 co-relation queries the response was YES. [2024-06-03 19:05:32,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15247 conditions, 2514 events. 1559/2514 cut-off events. For 75902/75906 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 13040 event pairs, 451 based on Foata normal form. 3/2516 useless extension candidates. Maximal degree in co-relation 15192. Up to 2311 conditions per place. [2024-06-03 19:05:32,640 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 124 selfloop transitions, 17 changer transitions 0/147 dead transitions. [2024-06-03 19:05:32,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 147 transitions, 1383 flow [2024-06-03 19:05:32,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:05:32,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:05:32,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-03 19:05:32,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-03 19:05:32,641 INFO L175 Difference]: Start difference. First operand has 120 places, 136 transitions, 1035 flow. Second operand 6 states and 114 transitions. [2024-06-03 19:05:32,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 147 transitions, 1383 flow [2024-06-03 19:05:32,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 147 transitions, 1329 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-03 19:05:32,686 INFO L231 Difference]: Finished difference. Result has 121 places, 139 transitions, 1071 flow [2024-06-03 19:05:32,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=981, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1071, PETRI_PLACES=121, PETRI_TRANSITIONS=139} [2024-06-03 19:05:32,687 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 77 predicate places. [2024-06-03 19:05:32,687 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 139 transitions, 1071 flow [2024-06-03 19:05:32,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:32,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:05:32,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:05:32,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 19:05:32,688 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:05:32,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:05:32,688 INFO L85 PathProgramCache]: Analyzing trace with hash 231980325, now seen corresponding path program 1 times [2024-06-03 19:05:32,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:05:32,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437236829] [2024-06-03 19:05:32,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:05:32,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:05:32,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:05:33,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:05:33,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:05:33,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437236829] [2024-06-03 19:05:33,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437236829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:05:33,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:05:33,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:05:33,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854243511] [2024-06-03 19:05:33,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:05:33,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:05:33,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:05:33,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:05:33,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:05:33,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:05:33,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 139 transitions, 1071 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:33,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:05:33,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:05:33,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:05:34,541 INFO L124 PetriNetUnfolderBase]: 1932/3020 cut-off events. [2024-06-03 19:05:34,541 INFO L125 PetriNetUnfolderBase]: For 114677/114681 co-relation queries the response was YES. [2024-06-03 19:05:34,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19644 conditions, 3020 events. 1932/3020 cut-off events. For 114677/114681 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 15588 event pairs, 425 based on Foata normal form. 20/3039 useless extension candidates. Maximal degree in co-relation 19588. Up to 2448 conditions per place. [2024-06-03 19:05:34,561 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 150 selfloop transitions, 35 changer transitions 0/190 dead transitions. [2024-06-03 19:05:34,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 190 transitions, 1789 flow [2024-06-03 19:05:34,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:05:34,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:05:34,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-03 19:05:34,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4627906976744186 [2024-06-03 19:05:34,563 INFO L175 Difference]: Start difference. First operand has 121 places, 139 transitions, 1071 flow. Second operand 10 states and 199 transitions. [2024-06-03 19:05:34,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 190 transitions, 1789 flow [2024-06-03 19:05:34,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 190 transitions, 1721 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-03 19:05:34,615 INFO L231 Difference]: Finished difference. Result has 127 places, 141 transitions, 1145 flow [2024-06-03 19:05:34,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1003, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1145, PETRI_PLACES=127, PETRI_TRANSITIONS=141} [2024-06-03 19:05:34,616 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 83 predicate places. [2024-06-03 19:05:34,616 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 141 transitions, 1145 flow [2024-06-03 19:05:34,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:34,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:05:34,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:05:34,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 19:05:34,617 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:05:34,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:05:34,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1526312305, now seen corresponding path program 2 times [2024-06-03 19:05:34,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:05:34,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573510449] [2024-06-03 19:05:34,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:05:34,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:05:34,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:05:35,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:05:35,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:05:35,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573510449] [2024-06-03 19:05:35,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573510449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:05:35,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:05:35,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:05:35,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805236164] [2024-06-03 19:05:35,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:05:35,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:05:35,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:05:35,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:05:35,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:05:35,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:05:35,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 141 transitions, 1145 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:35,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:05:35,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:05:35,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:05:36,464 INFO L124 PetriNetUnfolderBase]: 1982/3112 cut-off events. [2024-06-03 19:05:36,465 INFO L125 PetriNetUnfolderBase]: For 122583/122587 co-relation queries the response was YES. [2024-06-03 19:05:36,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20369 conditions, 3112 events. 1982/3112 cut-off events. For 122583/122587 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 16207 event pairs, 592 based on Foata normal form. 24/3135 useless extension candidates. Maximal degree in co-relation 20312. Up to 2770 conditions per place. [2024-06-03 19:05:36,487 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 144 selfloop transitions, 31 changer transitions 0/180 dead transitions. [2024-06-03 19:05:36,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 180 transitions, 1669 flow [2024-06-03 19:05:36,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:05:36,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:05:36,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-03 19:05:36,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45219638242894056 [2024-06-03 19:05:36,490 INFO L175 Difference]: Start difference. First operand has 127 places, 141 transitions, 1145 flow. Second operand 9 states and 175 transitions. [2024-06-03 19:05:36,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 180 transitions, 1669 flow [2024-06-03 19:05:36,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 180 transitions, 1604 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-03 19:05:36,552 INFO L231 Difference]: Finished difference. Result has 130 places, 142 transitions, 1185 flow [2024-06-03 19:05:36,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1082, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1185, PETRI_PLACES=130, PETRI_TRANSITIONS=142} [2024-06-03 19:05:36,553 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 86 predicate places. [2024-06-03 19:05:36,553 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 142 transitions, 1185 flow [2024-06-03 19:05:36,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:36,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:05:36,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:05:36,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 19:05:36,554 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:05:36,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:05:36,554 INFO L85 PathProgramCache]: Analyzing trace with hash 320546085, now seen corresponding path program 3 times [2024-06-03 19:05:36,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:05:36,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245609631] [2024-06-03 19:05:36,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:05:36,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:05:36,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:05:37,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:05:37,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:05:37,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245609631] [2024-06-03 19:05:37,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245609631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:05:37,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:05:37,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:05:37,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524930578] [2024-06-03 19:05:37,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:05:37,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:05:37,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:05:37,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:05:37,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:05:37,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:05:37,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 142 transitions, 1185 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:37,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:05:37,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:05:37,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:05:38,337 INFO L124 PetriNetUnfolderBase]: 1954/3068 cut-off events. [2024-06-03 19:05:38,337 INFO L125 PetriNetUnfolderBase]: For 120885/120889 co-relation queries the response was YES. [2024-06-03 19:05:38,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19808 conditions, 3068 events. 1954/3068 cut-off events. For 120885/120889 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 15947 event pairs, 552 based on Foata normal form. 20/3087 useless extension candidates. Maximal degree in co-relation 19749. Up to 2611 conditions per place. [2024-06-03 19:05:38,359 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 147 selfloop transitions, 32 changer transitions 0/184 dead transitions. [2024-06-03 19:05:38,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 184 transitions, 1701 flow [2024-06-03 19:05:38,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:05:38,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:05:38,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-03 19:05:38,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625322997416021 [2024-06-03 19:05:38,361 INFO L175 Difference]: Start difference. First operand has 130 places, 142 transitions, 1185 flow. Second operand 9 states and 179 transitions. [2024-06-03 19:05:38,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 184 transitions, 1701 flow [2024-06-03 19:05:38,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 184 transitions, 1618 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-03 19:05:38,432 INFO L231 Difference]: Finished difference. Result has 132 places, 142 transitions, 1172 flow [2024-06-03 19:05:38,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1102, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1172, PETRI_PLACES=132, PETRI_TRANSITIONS=142} [2024-06-03 19:05:38,433 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 88 predicate places. [2024-06-03 19:05:38,433 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 142 transitions, 1172 flow [2024-06-03 19:05:38,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:38,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:05:38,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:05:38,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 19:05:38,434 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:05:38,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:05:38,434 INFO L85 PathProgramCache]: Analyzing trace with hash -400247071, now seen corresponding path program 4 times [2024-06-03 19:05:38,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:05:38,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81993248] [2024-06-03 19:05:38,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:05:38,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:05:38,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:05:39,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:05:39,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:05:39,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81993248] [2024-06-03 19:05:39,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81993248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:05:39,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:05:39,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:05:39,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628256944] [2024-06-03 19:05:39,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:05:39,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:05:39,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:05:39,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:05:39,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:05:39,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:05:39,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 142 transitions, 1172 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:39,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:05:39,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:05:39,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:05:40,105 INFO L124 PetriNetUnfolderBase]: 2029/3200 cut-off events. [2024-06-03 19:05:40,105 INFO L125 PetriNetUnfolderBase]: For 129526/129530 co-relation queries the response was YES. [2024-06-03 19:05:40,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20564 conditions, 3200 events. 2029/3200 cut-off events. For 129526/129530 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 16954 event pairs, 545 based on Foata normal form. 20/3218 useless extension candidates. Maximal degree in co-relation 20504. Up to 2619 conditions per place. [2024-06-03 19:05:40,131 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 112 selfloop transitions, 63 changer transitions 0/180 dead transitions. [2024-06-03 19:05:40,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 180 transitions, 1690 flow [2024-06-03 19:05:40,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:05:40,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:05:40,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-03 19:05:40,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4754521963824289 [2024-06-03 19:05:40,132 INFO L175 Difference]: Start difference. First operand has 132 places, 142 transitions, 1172 flow. Second operand 9 states and 184 transitions. [2024-06-03 19:05:40,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 180 transitions, 1690 flow [2024-06-03 19:05:40,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 180 transitions, 1604 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-03 19:05:40,218 INFO L231 Difference]: Finished difference. Result has 133 places, 143 transitions, 1255 flow [2024-06-03 19:05:40,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1086, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1255, PETRI_PLACES=133, PETRI_TRANSITIONS=143} [2024-06-03 19:05:40,219 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 89 predicate places. [2024-06-03 19:05:40,219 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 143 transitions, 1255 flow [2024-06-03 19:05:40,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:40,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:05:40,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:05:40,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 19:05:40,219 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:05:40,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:05:40,220 INFO L85 PathProgramCache]: Analyzing trace with hash -400394941, now seen corresponding path program 5 times [2024-06-03 19:05:40,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:05:40,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400819828] [2024-06-03 19:05:40,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:05:40,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:05:40,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:05:41,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:05:41,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:05:41,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400819828] [2024-06-03 19:05:41,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400819828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:05:41,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:05:41,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:05:41,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796330222] [2024-06-03 19:05:41,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:05:41,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:05:41,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:05:41,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:05:41,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:05:41,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:05:41,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 143 transitions, 1255 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:41,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:05:41,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:05:41,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:05:42,121 INFO L124 PetriNetUnfolderBase]: 2198/3494 cut-off events. [2024-06-03 19:05:42,121 INFO L125 PetriNetUnfolderBase]: For 149236/149240 co-relation queries the response was YES. [2024-06-03 19:05:42,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23071 conditions, 3494 events. 2198/3494 cut-off events. For 149236/149240 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 19192 event pairs, 573 based on Foata normal form. 16/3508 useless extension candidates. Maximal degree in co-relation 23010. Up to 2622 conditions per place. [2024-06-03 19:05:42,147 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 116 selfloop transitions, 66 changer transitions 0/187 dead transitions. [2024-06-03 19:05:42,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 187 transitions, 1967 flow [2024-06-03 19:05:42,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:05:42,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:05:42,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-03 19:05:42,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48578811369509045 [2024-06-03 19:05:42,148 INFO L175 Difference]: Start difference. First operand has 133 places, 143 transitions, 1255 flow. Second operand 9 states and 188 transitions. [2024-06-03 19:05:42,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 187 transitions, 1967 flow [2024-06-03 19:05:42,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 187 transitions, 1826 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-03 19:05:42,226 INFO L231 Difference]: Finished difference. Result has 135 places, 145 transitions, 1326 flow [2024-06-03 19:05:42,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1114, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1326, PETRI_PLACES=135, PETRI_TRANSITIONS=145} [2024-06-03 19:05:42,226 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 91 predicate places. [2024-06-03 19:05:42,226 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 145 transitions, 1326 flow [2024-06-03 19:05:42,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:42,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:05:42,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:05:42,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 19:05:42,227 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:05:42,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:05:42,227 INFO L85 PathProgramCache]: Analyzing trace with hash -394884691, now seen corresponding path program 6 times [2024-06-03 19:05:42,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:05:42,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754958379] [2024-06-03 19:05:42,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:05:42,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:05:42,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:05:43,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:05:43,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:05:43,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754958379] [2024-06-03 19:05:43,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754958379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:05:43,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:05:43,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:05:43,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961827108] [2024-06-03 19:05:43,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:05:43,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:05:43,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:05:43,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:05:43,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:05:43,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:05:43,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 145 transitions, 1326 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:43,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:05:43,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:05:43,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:05:43,924 INFO L124 PetriNetUnfolderBase]: 2162/3438 cut-off events. [2024-06-03 19:05:43,925 INFO L125 PetriNetUnfolderBase]: For 147406/147410 co-relation queries the response was YES. [2024-06-03 19:05:43,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22251 conditions, 3438 events. 2162/3438 cut-off events. For 147406/147410 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 18837 event pairs, 575 based on Foata normal form. 20/3456 useless extension candidates. Maximal degree in co-relation 22189. Up to 2842 conditions per place. [2024-06-03 19:05:43,949 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 111 selfloop transitions, 65 changer transitions 0/181 dead transitions. [2024-06-03 19:05:43,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 181 transitions, 1808 flow [2024-06-03 19:05:43,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:05:43,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:05:43,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-03 19:05:43,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702842377260982 [2024-06-03 19:05:43,958 INFO L175 Difference]: Start difference. First operand has 135 places, 145 transitions, 1326 flow. Second operand 9 states and 182 transitions. [2024-06-03 19:05:43,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 181 transitions, 1808 flow [2024-06-03 19:05:44,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 181 transitions, 1692 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-03 19:05:44,031 INFO L231 Difference]: Finished difference. Result has 139 places, 145 transitions, 1347 flow [2024-06-03 19:05:44,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1210, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1347, PETRI_PLACES=139, PETRI_TRANSITIONS=145} [2024-06-03 19:05:44,032 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 95 predicate places. [2024-06-03 19:05:44,032 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 145 transitions, 1347 flow [2024-06-03 19:05:44,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:44,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:05:44,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:05:44,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 19:05:44,033 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:05:44,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:05:44,033 INFO L85 PathProgramCache]: Analyzing trace with hash 810949140, now seen corresponding path program 1 times [2024-06-03 19:05:44,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:05:44,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006286669] [2024-06-03 19:05:44,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:05:44,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:05:44,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:05:45,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:05:45,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:05:45,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006286669] [2024-06-03 19:05:45,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006286669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:05:45,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:05:45,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:05:45,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651459178] [2024-06-03 19:05:45,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:05:45,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:05:45,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:05:45,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:05:45,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:05:45,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:05:45,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 145 transitions, 1347 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:45,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:05:45,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:05:45,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:05:46,051 INFO L124 PetriNetUnfolderBase]: 2179/3462 cut-off events. [2024-06-03 19:05:46,051 INFO L125 PetriNetUnfolderBase]: For 143421/143427 co-relation queries the response was YES. [2024-06-03 19:05:46,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22502 conditions, 3462 events. 2179/3462 cut-off events. For 143421/143427 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 18935 event pairs, 586 based on Foata normal form. 8/3468 useless extension candidates. Maximal degree in co-relation 22438. Up to 3171 conditions per place. [2024-06-03 19:05:46,076 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 140 selfloop transitions, 37 changer transitions 0/182 dead transitions. [2024-06-03 19:05:46,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 182 transitions, 1869 flow [2024-06-03 19:05:46,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:05:46,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:05:46,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-03 19:05:46,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-03 19:05:46,078 INFO L175 Difference]: Start difference. First operand has 139 places, 145 transitions, 1347 flow. Second operand 9 states and 174 transitions. [2024-06-03 19:05:46,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 182 transitions, 1869 flow [2024-06-03 19:05:46,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 182 transitions, 1725 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-03 19:05:46,156 INFO L231 Difference]: Finished difference. Result has 141 places, 150 transitions, 1360 flow [2024-06-03 19:05:46,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1207, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1360, PETRI_PLACES=141, PETRI_TRANSITIONS=150} [2024-06-03 19:05:46,157 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 97 predicate places. [2024-06-03 19:05:46,157 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 150 transitions, 1360 flow [2024-06-03 19:05:46,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:46,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:05:46,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:05:46,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 19:05:46,158 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:05:46,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:05:46,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1517076744, now seen corresponding path program 1 times [2024-06-03 19:05:46,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:05:46,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309007408] [2024-06-03 19:05:46,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:05:46,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:05:46,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:05:47,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:05:47,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:05:47,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309007408] [2024-06-03 19:05:47,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309007408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:05:47,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:05:47,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:05:47,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234630274] [2024-06-03 19:05:47,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:05:47,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:05:47,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:05:47,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:05:47,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:05:47,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-03 19:05:47,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 150 transitions, 1360 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:47,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:05:47,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-03 19:05:47,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:05:47,740 INFO L124 PetriNetUnfolderBase]: 1921/3178 cut-off events. [2024-06-03 19:05:47,740 INFO L125 PetriNetUnfolderBase]: For 146617/146631 co-relation queries the response was YES. [2024-06-03 19:05:47,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21264 conditions, 3178 events. 1921/3178 cut-off events. For 146617/146631 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 18363 event pairs, 584 based on Foata normal form. 10/3144 useless extension candidates. Maximal degree in co-relation 21198. Up to 2796 conditions per place. [2024-06-03 19:05:47,764 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 113 selfloop transitions, 25 changer transitions 0/167 dead transitions. [2024-06-03 19:05:47,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 167 transitions, 1710 flow [2024-06-03 19:05:47,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:05:47,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:05:47,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-03 19:05:47,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46179401993355484 [2024-06-03 19:05:47,766 INFO L175 Difference]: Start difference. First operand has 141 places, 150 transitions, 1360 flow. Second operand 7 states and 139 transitions. [2024-06-03 19:05:47,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 167 transitions, 1710 flow [2024-06-03 19:05:47,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 167 transitions, 1599 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-03 19:05:47,850 INFO L231 Difference]: Finished difference. Result has 142 places, 153 transitions, 1345 flow [2024-06-03 19:05:47,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1249, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1345, PETRI_PLACES=142, PETRI_TRANSITIONS=153} [2024-06-03 19:05:47,851 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 98 predicate places. [2024-06-03 19:05:47,851 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 153 transitions, 1345 flow [2024-06-03 19:05:47,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:47,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:05:47,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:05:47,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 19:05:47,852 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:05:47,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:05:47,852 INFO L85 PathProgramCache]: Analyzing trace with hash 166843157, now seen corresponding path program 7 times [2024-06-03 19:05:47,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:05:47,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108773914] [2024-06-03 19:05:47,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:05:47,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:05:47,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:05:48,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:05:48,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:05:48,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108773914] [2024-06-03 19:05:48,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108773914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:05:48,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:05:48,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:05:48,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244840473] [2024-06-03 19:05:48,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:05:48,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:05:48,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:05:48,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:05:48,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:05:48,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:05:48,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 153 transitions, 1345 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:48,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:05:48,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:05:48,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:05:49,594 INFO L124 PetriNetUnfolderBase]: 2264/3598 cut-off events. [2024-06-03 19:05:49,594 INFO L125 PetriNetUnfolderBase]: For 170027/170029 co-relation queries the response was YES. [2024-06-03 19:05:49,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24098 conditions, 3598 events. 2264/3598 cut-off events. For 170027/170029 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 19862 event pairs, 568 based on Foata normal form. 20/3616 useless extension candidates. Maximal degree in co-relation 24031. Up to 3008 conditions per place. [2024-06-03 19:05:49,623 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 121 selfloop transitions, 63 changer transitions 0/189 dead transitions. [2024-06-03 19:05:49,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 189 transitions, 1893 flow [2024-06-03 19:05:49,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:05:49,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:05:49,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-03 19:05:49,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-03 19:05:49,625 INFO L175 Difference]: Start difference. First operand has 142 places, 153 transitions, 1345 flow. Second operand 9 states and 180 transitions. [2024-06-03 19:05:49,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 189 transitions, 1893 flow [2024-06-03 19:05:49,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 189 transitions, 1819 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-03 19:05:49,717 INFO L231 Difference]: Finished difference. Result has 146 places, 154 transitions, 1446 flow [2024-06-03 19:05:49,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1271, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1446, PETRI_PLACES=146, PETRI_TRANSITIONS=154} [2024-06-03 19:05:49,718 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 102 predicate places. [2024-06-03 19:05:49,718 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 154 transitions, 1446 flow [2024-06-03 19:05:49,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:49,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:05:49,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:05:49,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 19:05:49,718 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:05:49,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:05:49,719 INFO L85 PathProgramCache]: Analyzing trace with hash 161480777, now seen corresponding path program 8 times [2024-06-03 19:05:49,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:05:49,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890151927] [2024-06-03 19:05:49,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:05:49,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:05:49,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:05:50,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:05:50,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:05:50,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890151927] [2024-06-03 19:05:50,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890151927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:05:50,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:05:50,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:05:50,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886946033] [2024-06-03 19:05:50,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:05:50,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:05:50,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:05:50,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:05:50,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:05:50,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:05:50,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 154 transitions, 1446 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:50,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:05:50,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:05:50,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:05:51,660 INFO L124 PetriNetUnfolderBase]: 2339/3739 cut-off events. [2024-06-03 19:05:51,660 INFO L125 PetriNetUnfolderBase]: For 183216/183220 co-relation queries the response was YES. [2024-06-03 19:05:51,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25361 conditions, 3739 events. 2339/3739 cut-off events. For 183216/183220 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 21016 event pairs, 592 based on Foata normal form. 20/3757 useless extension candidates. Maximal degree in co-relation 25293. Up to 3133 conditions per place. [2024-06-03 19:05:51,686 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 121 selfloop transitions, 64 changer transitions 0/190 dead transitions. [2024-06-03 19:05:51,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 190 transitions, 1998 flow [2024-06-03 19:05:51,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:05:51,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:05:51,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-03 19:05:51,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4625322997416021 [2024-06-03 19:05:51,688 INFO L175 Difference]: Start difference. First operand has 146 places, 154 transitions, 1446 flow. Second operand 9 states and 179 transitions. [2024-06-03 19:05:51,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 190 transitions, 1998 flow [2024-06-03 19:05:51,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 190 transitions, 1851 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-03 19:05:51,800 INFO L231 Difference]: Finished difference. Result has 148 places, 155 transitions, 1478 flow [2024-06-03 19:05:51,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1299, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1478, PETRI_PLACES=148, PETRI_TRANSITIONS=155} [2024-06-03 19:05:51,801 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 104 predicate places. [2024-06-03 19:05:51,801 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 155 transitions, 1478 flow [2024-06-03 19:05:51,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:51,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:05:51,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:05:51,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 19:05:51,802 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:05:51,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:05:51,802 INFO L85 PathProgramCache]: Analyzing trace with hash 161332907, now seen corresponding path program 9 times [2024-06-03 19:05:51,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:05:51,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845177743] [2024-06-03 19:05:51,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:05:51,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:05:51,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:05:52,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:05:52,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:05:52,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845177743] [2024-06-03 19:05:52,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845177743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:05:52,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:05:52,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:05:52,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621264273] [2024-06-03 19:05:52,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:05:52,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:05:52,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:05:52,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:05:52,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:05:52,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:05:52,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 155 transitions, 1478 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:52,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:05:52,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:05:52,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:05:53,716 INFO L124 PetriNetUnfolderBase]: 2458/3940 cut-off events. [2024-06-03 19:05:53,717 INFO L125 PetriNetUnfolderBase]: For 200714/200718 co-relation queries the response was YES. [2024-06-03 19:05:53,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27168 conditions, 3940 events. 2458/3940 cut-off events. For 200714/200718 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 22419 event pairs, 602 based on Foata normal form. 16/3954 useless extension candidates. Maximal degree in co-relation 27099. Up to 2938 conditions per place. [2024-06-03 19:05:53,745 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 124 selfloop transitions, 68 changer transitions 0/197 dead transitions. [2024-06-03 19:05:53,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 197 transitions, 2254 flow [2024-06-03 19:05:53,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:05:53,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:05:53,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-03 19:05:53,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4728682170542636 [2024-06-03 19:05:53,747 INFO L175 Difference]: Start difference. First operand has 148 places, 155 transitions, 1478 flow. Second operand 9 states and 183 transitions. [2024-06-03 19:05:53,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 197 transitions, 2254 flow [2024-06-03 19:05:53,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 197 transitions, 2103 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-03 19:05:53,850 INFO L231 Difference]: Finished difference. Result has 150 places, 157 transitions, 1559 flow [2024-06-03 19:05:53,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1327, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1559, PETRI_PLACES=150, PETRI_TRANSITIONS=157} [2024-06-03 19:05:53,850 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 106 predicate places. [2024-06-03 19:05:53,850 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 157 transitions, 1559 flow [2024-06-03 19:05:53,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:53,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:05:53,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:05:53,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-03 19:05:53,851 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:05:53,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:05:53,852 INFO L85 PathProgramCache]: Analyzing trace with hash 360782567, now seen corresponding path program 10 times [2024-06-03 19:05:53,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:05:53,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528437137] [2024-06-03 19:05:53,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:05:53,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:05:53,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:05:54,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:05:54,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:05:54,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528437137] [2024-06-03 19:05:54,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528437137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:05:54,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:05:54,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:05:54,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058923407] [2024-06-03 19:05:54,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:05:54,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:05:54,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:05:54,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:05:54,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:05:54,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:05:54,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 157 transitions, 1559 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:54,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:05:54,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:05:54,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:05:55,858 INFO L124 PetriNetUnfolderBase]: 2422/3884 cut-off events. [2024-06-03 19:05:55,859 INFO L125 PetriNetUnfolderBase]: For 195634/195638 co-relation queries the response was YES. [2024-06-03 19:05:55,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26110 conditions, 3884 events. 2422/3884 cut-off events. For 195634/195638 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 22041 event pairs, 609 based on Foata normal form. 20/3902 useless extension candidates. Maximal degree in co-relation 26040. Up to 3278 conditions per place. [2024-06-03 19:05:55,888 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 119 selfloop transitions, 67 changer transitions 0/191 dead transitions. [2024-06-03 19:05:55,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 191 transitions, 2065 flow [2024-06-03 19:05:55,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:05:55,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:05:55,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-03 19:05:55,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-03 19:05:55,890 INFO L175 Difference]: Start difference. First operand has 150 places, 157 transitions, 1559 flow. Second operand 9 states and 177 transitions. [2024-06-03 19:05:55,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 191 transitions, 2065 flow [2024-06-03 19:05:56,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 191 transitions, 1934 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-03 19:05:56,042 INFO L231 Difference]: Finished difference. Result has 154 places, 157 transitions, 1569 flow [2024-06-03 19:05:56,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1428, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1569, PETRI_PLACES=154, PETRI_TRANSITIONS=157} [2024-06-03 19:05:56,042 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 110 predicate places. [2024-06-03 19:05:56,042 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 157 transitions, 1569 flow [2024-06-03 19:05:56,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:56,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:05:56,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:05:56,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-03 19:05:56,043 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:05:56,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:05:56,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1357940304, now seen corresponding path program 2 times [2024-06-03 19:05:56,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:05:56,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169474338] [2024-06-03 19:05:56,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:05:56,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:05:56,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:05:57,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:05:57,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:05:57,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169474338] [2024-06-03 19:05:57,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169474338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:05:57,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:05:57,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:05:57,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499935849] [2024-06-03 19:05:57,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:05:57,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:05:57,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:05:57,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:05:57,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:05:57,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:05:57,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 157 transitions, 1569 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:57,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:05:57,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:05:57,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:05:57,916 INFO L124 PetriNetUnfolderBase]: 2450/3930 cut-off events. [2024-06-03 19:05:57,916 INFO L125 PetriNetUnfolderBase]: For 186507/186515 co-relation queries the response was YES. [2024-06-03 19:05:57,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26358 conditions, 3930 events. 2450/3930 cut-off events. For 186507/186515 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 22371 event pairs, 643 based on Foata normal form. 12/3941 useless extension candidates. Maximal degree in co-relation 26286. Up to 3619 conditions per place. [2024-06-03 19:05:57,949 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 148 selfloop transitions, 40 changer transitions 0/193 dead transitions. [2024-06-03 19:05:57,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 193 transitions, 2132 flow [2024-06-03 19:05:57,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:05:57,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:05:57,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-03 19:05:57,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-03 19:05:57,951 INFO L175 Difference]: Start difference. First operand has 154 places, 157 transitions, 1569 flow. Second operand 9 states and 170 transitions. [2024-06-03 19:05:57,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 193 transitions, 2132 flow [2024-06-03 19:05:58,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 193 transitions, 1977 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-03 19:05:58,066 INFO L231 Difference]: Finished difference. Result has 156 places, 163 transitions, 1602 flow [2024-06-03 19:05:58,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1420, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1602, PETRI_PLACES=156, PETRI_TRANSITIONS=163} [2024-06-03 19:05:58,066 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 112 predicate places. [2024-06-03 19:05:58,066 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 163 transitions, 1602 flow [2024-06-03 19:05:58,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:58,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:05:58,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:05:58,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-03 19:05:58,067 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:05:58,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:05:58,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1997290382, now seen corresponding path program 3 times [2024-06-03 19:05:58,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:05:58,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980299073] [2024-06-03 19:05:58,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:05:58,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:05:58,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:05:59,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:05:59,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:05:59,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980299073] [2024-06-03 19:05:59,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980299073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:05:59,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:05:59,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:05:59,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994186049] [2024-06-03 19:05:59,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:05:59,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:05:59,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:05:59,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:05:59,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:05:59,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:05:59,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 163 transitions, 1602 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:05:59,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:05:59,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:05:59,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:06:00,163 INFO L124 PetriNetUnfolderBase]: 2467/3987 cut-off events. [2024-06-03 19:06:00,163 INFO L125 PetriNetUnfolderBase]: For 195800/195808 co-relation queries the response was YES. [2024-06-03 19:06:00,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26928 conditions, 3987 events. 2467/3987 cut-off events. For 195800/195808 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 23001 event pairs, 663 based on Foata normal form. 12/3998 useless extension candidates. Maximal degree in co-relation 26854. Up to 3646 conditions per place. [2024-06-03 19:06:00,198 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 151 selfloop transitions, 41 changer transitions 0/197 dead transitions. [2024-06-03 19:06:00,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 197 transitions, 2163 flow [2024-06-03 19:06:00,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:06:00,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:06:00,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-03 19:06:00,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-03 19:06:00,201 INFO L175 Difference]: Start difference. First operand has 156 places, 163 transitions, 1602 flow. Second operand 9 states and 171 transitions. [2024-06-03 19:06:00,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 197 transitions, 2163 flow [2024-06-03 19:06:00,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 197 transitions, 2030 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-03 19:06:00,311 INFO L231 Difference]: Finished difference. Result has 160 places, 168 transitions, 1653 flow [2024-06-03 19:06:00,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1473, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1653, PETRI_PLACES=160, PETRI_TRANSITIONS=168} [2024-06-03 19:06:00,311 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 116 predicate places. [2024-06-03 19:06:00,311 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 168 transitions, 1653 flow [2024-06-03 19:06:00,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:06:00,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:06:00,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:06:00,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-03 19:06:00,312 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:06:00,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:06:00,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1042105190, now seen corresponding path program 4 times [2024-06-03 19:06:00,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:06:00,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088054672] [2024-06-03 19:06:00,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:06:00,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:06:00,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:06:01,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:06:01,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:06:01,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088054672] [2024-06-03 19:06:01,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088054672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:06:01,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:06:01,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:06:01,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613758469] [2024-06-03 19:06:01,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:06:01,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:06:01,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:06:01,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:06:01,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:06:01,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:06:01,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 168 transitions, 1653 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:06:01,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:06:01,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:06:01,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:06:02,371 INFO L124 PetriNetUnfolderBase]: 2484/4004 cut-off events. [2024-06-03 19:06:02,372 INFO L125 PetriNetUnfolderBase]: For 205746/205754 co-relation queries the response was YES. [2024-06-03 19:06:02,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27587 conditions, 4004 events. 2484/4004 cut-off events. For 205746/205754 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 23026 event pairs, 668 based on Foata normal form. 12/4015 useless extension candidates. Maximal degree in co-relation 27511. Up to 3673 conditions per place. [2024-06-03 19:06:02,403 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 150 selfloop transitions, 46 changer transitions 0/201 dead transitions. [2024-06-03 19:06:02,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 201 transitions, 2220 flow [2024-06-03 19:06:02,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:06:02,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:06:02,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-03 19:06:02,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-03 19:06:02,405 INFO L175 Difference]: Start difference. First operand has 160 places, 168 transitions, 1653 flow. Second operand 9 states and 169 transitions. [2024-06-03 19:06:02,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 201 transitions, 2220 flow [2024-06-03 19:06:02,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 201 transitions, 2079 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-03 19:06:02,522 INFO L231 Difference]: Finished difference. Result has 163 places, 172 transitions, 1698 flow [2024-06-03 19:06:02,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1516, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1698, PETRI_PLACES=163, PETRI_TRANSITIONS=172} [2024-06-03 19:06:02,522 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 119 predicate places. [2024-06-03 19:06:02,522 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 172 transitions, 1698 flow [2024-06-03 19:06:02,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:06:02,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:06:02,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:06:02,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-03 19:06:02,524 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:06:02,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:06:02,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1051628390, now seen corresponding path program 5 times [2024-06-03 19:06:02,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:06:02,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659951276] [2024-06-03 19:06:02,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:06:02,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:06:02,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:06:03,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:06:03,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:06:03,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659951276] [2024-06-03 19:06:03,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659951276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:06:03,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:06:03,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:06:03,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499237416] [2024-06-03 19:06:03,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:06:03,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:06:03,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:06:03,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:06:03,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:06:03,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:06:03,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 172 transitions, 1698 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:06:03,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:06:03,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:06:03,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:06:04,550 INFO L124 PetriNetUnfolderBase]: 2476/3982 cut-off events. [2024-06-03 19:06:04,551 INFO L125 PetriNetUnfolderBase]: For 210352/210360 co-relation queries the response was YES. [2024-06-03 19:06:04,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27544 conditions, 3982 events. 2476/3982 cut-off events. For 210352/210360 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 22837 event pairs, 594 based on Foata normal form. 12/3993 useless extension candidates. Maximal degree in co-relation 27467. Up to 3566 conditions per place. [2024-06-03 19:06:04,587 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 144 selfloop transitions, 55 changer transitions 0/204 dead transitions. [2024-06-03 19:06:04,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 204 transitions, 2256 flow [2024-06-03 19:06:04,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:06:04,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:06:04,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-03 19:06:04,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-03 19:06:04,589 INFO L175 Difference]: Start difference. First operand has 163 places, 172 transitions, 1698 flow. Second operand 9 states and 170 transitions. [2024-06-03 19:06:04,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 204 transitions, 2256 flow [2024-06-03 19:06:04,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 204 transitions, 2127 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-03 19:06:04,698 INFO L231 Difference]: Finished difference. Result has 167 places, 174 transitions, 1756 flow [2024-06-03 19:06:04,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1569, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1756, PETRI_PLACES=167, PETRI_TRANSITIONS=174} [2024-06-03 19:06:04,699 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 123 predicate places. [2024-06-03 19:06:04,699 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 174 transitions, 1756 flow [2024-06-03 19:06:04,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:06:04,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:06:04,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:06:04,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-03 19:06:04,701 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:06:04,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:06:04,702 INFO L85 PathProgramCache]: Analyzing trace with hash 28764532, now seen corresponding path program 2 times [2024-06-03 19:06:04,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:06:04,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847491077] [2024-06-03 19:06:04,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:06:04,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:06:04,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:06:05,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:06:05,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:06:05,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847491077] [2024-06-03 19:06:05,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847491077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:06:05,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:06:05,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:06:05,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630883796] [2024-06-03 19:06:05,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:06:05,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:06:05,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:06:05,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:06:05,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:06:05,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-03 19:06:05,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 174 transitions, 1756 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:06:05,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:06:05,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-03 19:06:05,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:06:06,368 INFO L124 PetriNetUnfolderBase]: 2211/3673 cut-off events. [2024-06-03 19:06:06,369 INFO L125 PetriNetUnfolderBase]: For 216587/216607 co-relation queries the response was YES. [2024-06-03 19:06:06,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26034 conditions, 3673 events. 2211/3673 cut-off events. For 216587/216607 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 22095 event pairs, 629 based on Foata normal form. 12/3631 useless extension candidates. Maximal degree in co-relation 25956. Up to 3257 conditions per place. [2024-06-03 19:06:06,402 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 121 selfloop transitions, 29 changer transitions 0/186 dead transitions. [2024-06-03 19:06:06,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 186 transitions, 2120 flow [2024-06-03 19:06:06,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:06:06,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:06:06,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-03 19:06:06,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485049833887043 [2024-06-03 19:06:06,405 INFO L175 Difference]: Start difference. First operand has 167 places, 174 transitions, 1756 flow. Second operand 7 states and 135 transitions. [2024-06-03 19:06:06,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 186 transitions, 2120 flow [2024-06-03 19:06:06,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 186 transitions, 1951 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-03 19:06:06,554 INFO L231 Difference]: Finished difference. Result has 167 places, 177 transitions, 1697 flow [2024-06-03 19:06:06,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1587, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1697, PETRI_PLACES=167, PETRI_TRANSITIONS=177} [2024-06-03 19:06:06,555 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 123 predicate places. [2024-06-03 19:06:06,555 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 177 transitions, 1697 flow [2024-06-03 19:06:06,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:06:06,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:06:06,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:06:06,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-03 19:06:06,555 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:06:06,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:06:06,556 INFO L85 PathProgramCache]: Analyzing trace with hash -120682674, now seen corresponding path program 3 times [2024-06-03 19:06:06,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:06:06,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477092536] [2024-06-03 19:06:06,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:06:06,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:06:06,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:06:07,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:06:07,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:06:07,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477092536] [2024-06-03 19:06:07,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477092536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:06:07,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:06:07,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:06:07,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910821866] [2024-06-03 19:06:07,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:06:07,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:06:07,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:06:07,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:06:07,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:06:07,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-03 19:06:07,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 177 transitions, 1697 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:06:07,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:06:07,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-03 19:06:07,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:06:08,150 INFO L124 PetriNetUnfolderBase]: 2196/3646 cut-off events. [2024-06-03 19:06:08,150 INFO L125 PetriNetUnfolderBase]: For 219616/219632 co-relation queries the response was YES. [2024-06-03 19:06:08,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25920 conditions, 3646 events. 2196/3646 cut-off events. For 219616/219632 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 21901 event pairs, 628 based on Foata normal form. 17/3609 useless extension candidates. Maximal degree in co-relation 25841. Up to 3229 conditions per place. [2024-06-03 19:06:08,183 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 119 selfloop transitions, 37 changer transitions 0/192 dead transitions. [2024-06-03 19:06:08,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 192 transitions, 2093 flow [2024-06-03 19:06:08,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:06:08,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:06:08,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-03 19:06:08,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-03 19:06:08,185 INFO L175 Difference]: Start difference. First operand has 167 places, 177 transitions, 1697 flow. Second operand 7 states and 136 transitions. [2024-06-03 19:06:08,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 192 transitions, 2093 flow [2024-06-03 19:06:08,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 192 transitions, 2005 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-03 19:06:08,368 INFO L231 Difference]: Finished difference. Result has 170 places, 183 transitions, 1771 flow [2024-06-03 19:06:08,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1609, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1771, PETRI_PLACES=170, PETRI_TRANSITIONS=183} [2024-06-03 19:06:08,369 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 126 predicate places. [2024-06-03 19:06:08,369 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 183 transitions, 1771 flow [2024-06-03 19:06:08,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:06:08,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:06:08,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:06:08,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-03 19:06:08,370 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:06:08,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:06:08,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1474293507, now seen corresponding path program 1 times [2024-06-03 19:06:08,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:06:08,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794290271] [2024-06-03 19:06:08,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:06:08,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:06:08,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:06:09,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:06:09,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:06:09,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794290271] [2024-06-03 19:06:09,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794290271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:06:09,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:06:09,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:06:09,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705426819] [2024-06-03 19:06:09,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:06:09,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:06:09,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:06:09,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:06:09,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:06:09,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:06:09,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 183 transitions, 1771 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:06:09,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:06:09,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:06:09,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:06:09,965 INFO L124 PetriNetUnfolderBase]: 2384/3897 cut-off events. [2024-06-03 19:06:09,966 INFO L125 PetriNetUnfolderBase]: For 232969/232971 co-relation queries the response was YES. [2024-06-03 19:06:09,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27965 conditions, 3897 events. 2384/3897 cut-off events. For 232969/232971 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 22768 event pairs, 624 based on Foata normal form. 2/3898 useless extension candidates. Maximal degree in co-relation 27884. Up to 3609 conditions per place. [2024-06-03 19:06:10,003 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 177 selfloop transitions, 15 changer transitions 0/202 dead transitions. [2024-06-03 19:06:10,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 202 transitions, 2249 flow [2024-06-03 19:06:10,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:06:10,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:06:10,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-03 19:06:10,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44518272425249167 [2024-06-03 19:06:10,005 INFO L175 Difference]: Start difference. First operand has 170 places, 183 transitions, 1771 flow. Second operand 7 states and 134 transitions. [2024-06-03 19:06:10,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 202 transitions, 2249 flow [2024-06-03 19:06:10,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 202 transitions, 2177 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-03 19:06:10,193 INFO L231 Difference]: Finished difference. Result has 174 places, 186 transitions, 1781 flow [2024-06-03 19:06:10,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1699, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1781, PETRI_PLACES=174, PETRI_TRANSITIONS=186} [2024-06-03 19:06:10,194 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 130 predicate places. [2024-06-03 19:06:10,194 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 186 transitions, 1781 flow [2024-06-03 19:06:10,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:06:10,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:06:10,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:06:10,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-03 19:06:10,194 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:06:10,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:06:10,195 INFO L85 PathProgramCache]: Analyzing trace with hash -177704613, now seen corresponding path program 2 times [2024-06-03 19:06:10,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:06:10,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596624286] [2024-06-03 19:06:10,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:06:10,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:06:10,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:06:11,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:06:11,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:06:11,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596624286] [2024-06-03 19:06:11,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596624286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:06:11,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:06:11,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:06:11,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223821516] [2024-06-03 19:06:11,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:06:11,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:06:11,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:06:11,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:06:11,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:06:11,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:06:11,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 186 transitions, 1781 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:06:11,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:06:11,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:06:11,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:06:11,797 INFO L124 PetriNetUnfolderBase]: 2394/3913 cut-off events. [2024-06-03 19:06:11,797 INFO L125 PetriNetUnfolderBase]: For 241587/241589 co-relation queries the response was YES. [2024-06-03 19:06:11,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28582 conditions, 3913 events. 2394/3913 cut-off events. For 241587/241589 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 22889 event pairs, 624 based on Foata normal form. 2/3914 useless extension candidates. Maximal degree in co-relation 28499. Up to 3614 conditions per place. [2024-06-03 19:06:11,831 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 173 selfloop transitions, 20 changer transitions 0/203 dead transitions. [2024-06-03 19:06:11,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 203 transitions, 2267 flow [2024-06-03 19:06:11,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:06:11,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:06:11,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-03 19:06:11,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44518272425249167 [2024-06-03 19:06:11,841 INFO L175 Difference]: Start difference. First operand has 174 places, 186 transitions, 1781 flow. Second operand 7 states and 134 transitions. [2024-06-03 19:06:11,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 203 transitions, 2267 flow [2024-06-03 19:06:12,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 203 transitions, 2207 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-03 19:06:12,034 INFO L231 Difference]: Finished difference. Result has 176 places, 189 transitions, 1819 flow [2024-06-03 19:06:12,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1721, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1819, PETRI_PLACES=176, PETRI_TRANSITIONS=189} [2024-06-03 19:06:12,034 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 132 predicate places. [2024-06-03 19:06:12,035 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 189 transitions, 1819 flow [2024-06-03 19:06:12,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:06:12,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:06:12,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:06:12,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-03 19:06:12,035 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:06:12,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:06:12,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1474443454, now seen corresponding path program 1 times [2024-06-03 19:06:12,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:06:12,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505828756] [2024-06-03 19:06:12,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:06:12,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:06:12,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:06:13,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:06:13,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:06:13,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505828756] [2024-06-03 19:06:13,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505828756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:06:13,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:06:13,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:06:13,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820758287] [2024-06-03 19:06:13,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:06:13,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:06:13,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:06:13,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:06:13,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:06:13,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:06:13,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 189 transitions, 1819 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:06:13,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:06:13,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:06:13,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:06:13,725 INFO L124 PetriNetUnfolderBase]: 2404/3927 cut-off events. [2024-06-03 19:06:13,726 INFO L125 PetriNetUnfolderBase]: For 251251/251253 co-relation queries the response was YES. [2024-06-03 19:06:13,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29172 conditions, 3927 events. 2404/3927 cut-off events. For 251251/251253 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 22949 event pairs, 622 based on Foata normal form. 2/3928 useless extension candidates. Maximal degree in co-relation 29088. Up to 3644 conditions per place. [2024-06-03 19:06:13,765 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 179 selfloop transitions, 15 changer transitions 0/204 dead transitions. [2024-06-03 19:06:13,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 204 transitions, 2285 flow [2024-06-03 19:06:13,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:06:13,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:06:13,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-03 19:06:13,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-03 19:06:13,766 INFO L175 Difference]: Start difference. First operand has 176 places, 189 transitions, 1819 flow. Second operand 7 states and 130 transitions. [2024-06-03 19:06:13,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 204 transitions, 2285 flow [2024-06-03 19:06:13,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 204 transitions, 2209 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-03 19:06:13,995 INFO L231 Difference]: Finished difference. Result has 178 places, 192 transitions, 1829 flow [2024-06-03 19:06:13,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1743, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1829, PETRI_PLACES=178, PETRI_TRANSITIONS=192} [2024-06-03 19:06:13,996 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 134 predicate places. [2024-06-03 19:06:13,996 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 192 transitions, 1829 flow [2024-06-03 19:06:13,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:06:13,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:06:13,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:06:13,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-03 19:06:13,996 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:06:13,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:06:13,997 INFO L85 PathProgramCache]: Analyzing trace with hash 29215954, now seen corresponding path program 2 times [2024-06-03 19:06:13,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:06:13,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232885900] [2024-06-03 19:06:13,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:06:13,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:06:14,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:06:15,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:06:15,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:06:15,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232885900] [2024-06-03 19:06:15,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232885900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:06:15,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:06:15,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:06:15,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592805865] [2024-06-03 19:06:15,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:06:15,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:06:15,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:06:15,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:06:15,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:06:15,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:06:15,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 192 transitions, 1829 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:06:15,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:06:15,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:06:15,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:06:15,884 INFO L124 PetriNetUnfolderBase]: 2409/3937 cut-off events. [2024-06-03 19:06:15,884 INFO L125 PetriNetUnfolderBase]: For 259612/259616 co-relation queries the response was YES. [2024-06-03 19:06:15,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29587 conditions, 3937 events. 2409/3937 cut-off events. For 259612/259616 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 23074 event pairs, 627 based on Foata normal form. 4/3940 useless extension candidates. Maximal degree in co-relation 29502. Up to 3631 conditions per place. [2024-06-03 19:06:15,921 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 171 selfloop transitions, 29 changer transitions 0/210 dead transitions. [2024-06-03 19:06:15,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 210 transitions, 2469 flow [2024-06-03 19:06:15,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:06:15,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:06:15,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-03 19:06:15,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-03 19:06:15,923 INFO L175 Difference]: Start difference. First operand has 178 places, 192 transitions, 1829 flow. Second operand 7 states and 131 transitions. [2024-06-03 19:06:15,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 210 transitions, 2469 flow [2024-06-03 19:06:16,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 210 transitions, 2405 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-03 19:06:16,177 INFO L231 Difference]: Finished difference. Result has 181 places, 200 transitions, 1965 flow [2024-06-03 19:06:16,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1765, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1965, PETRI_PLACES=181, PETRI_TRANSITIONS=200} [2024-06-03 19:06:16,178 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 137 predicate places. [2024-06-03 19:06:16,178 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 200 transitions, 1965 flow [2024-06-03 19:06:16,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:06:16,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:06:16,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:06:16,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-03 19:06:16,178 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:06:16,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:06:16,179 INFO L85 PathProgramCache]: Analyzing trace with hash 28949044, now seen corresponding path program 3 times [2024-06-03 19:06:16,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:06:16,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636627353] [2024-06-03 19:06:16,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:06:16,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:06:16,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:06:17,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:06:17,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:06:17,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636627353] [2024-06-03 19:06:17,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636627353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:06:17,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:06:17,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:06:17,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486528223] [2024-06-03 19:06:17,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:06:17,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:06:17,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:06:17,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:06:17,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:06:17,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:06:17,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 200 transitions, 1965 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:06:17,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:06:17,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:06:17,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:06:18,077 INFO L124 PetriNetUnfolderBase]: 2408/3936 cut-off events. [2024-06-03 19:06:18,077 INFO L125 PetriNetUnfolderBase]: For 268558/268562 co-relation queries the response was YES. [2024-06-03 19:06:18,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29930 conditions, 3936 events. 2408/3936 cut-off events. For 268558/268562 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 23028 event pairs, 626 based on Foata normal form. 5/3940 useless extension candidates. Maximal degree in co-relation 29843. Up to 3642 conditions per place. [2024-06-03 19:06:18,113 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 181 selfloop transitions, 22 changer transitions 0/213 dead transitions. [2024-06-03 19:06:18,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 213 transitions, 2456 flow [2024-06-03 19:06:18,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:06:18,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:06:18,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-03 19:06:18,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-03 19:06:18,115 INFO L175 Difference]: Start difference. First operand has 181 places, 200 transitions, 1965 flow. Second operand 7 states and 130 transitions. [2024-06-03 19:06:18,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 213 transitions, 2456 flow [2024-06-03 19:06:18,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 213 transitions, 2357 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-06-03 19:06:18,303 INFO L231 Difference]: Finished difference. Result has 185 places, 203 transitions, 1978 flow [2024-06-03 19:06:18,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1866, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1978, PETRI_PLACES=185, PETRI_TRANSITIONS=203} [2024-06-03 19:06:18,303 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 141 predicate places. [2024-06-03 19:06:18,303 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 203 transitions, 1978 flow [2024-06-03 19:06:18,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:06:18,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:06:18,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:06:18,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-03 19:06:18,304 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:06:18,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:06:18,304 INFO L85 PathProgramCache]: Analyzing trace with hash 23002367, now seen corresponding path program 3 times [2024-06-03 19:06:18,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:06:18,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187875837] [2024-06-03 19:06:18,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:06:18,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:06:18,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:06:19,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:06:19,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:06:19,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187875837] [2024-06-03 19:06:19,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187875837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:06:19,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:06:19,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:06:19,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078870900] [2024-06-03 19:06:19,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:06:19,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:06:19,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:06:19,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:06:19,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:06:19,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:06:19,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 203 transitions, 1978 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:06:19,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:06:19,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:06:19,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:06:19,839 INFO L124 PetriNetUnfolderBase]: 2410/3942 cut-off events. [2024-06-03 19:06:19,840 INFO L125 PetriNetUnfolderBase]: For 274073/274077 co-relation queries the response was YES. [2024-06-03 19:06:19,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30264 conditions, 3942 events. 2410/3942 cut-off events. For 274073/274077 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 23198 event pairs, 630 based on Foata normal form. 4/3945 useless extension candidates. Maximal degree in co-relation 30175. Up to 3624 conditions per place. [2024-06-03 19:06:19,880 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 180 selfloop transitions, 27 changer transitions 0/217 dead transitions. [2024-06-03 19:06:19,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 217 transitions, 2494 flow [2024-06-03 19:06:19,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:06:19,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:06:19,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-03 19:06:19,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-03 19:06:19,881 INFO L175 Difference]: Start difference. First operand has 185 places, 203 transitions, 1978 flow. Second operand 7 states and 133 transitions. [2024-06-03 19:06:19,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 217 transitions, 2494 flow [2024-06-03 19:06:20,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 217 transitions, 2414 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-03 19:06:20,136 INFO L231 Difference]: Finished difference. Result has 187 places, 206 transitions, 2022 flow [2024-06-03 19:06:20,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1898, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2022, PETRI_PLACES=187, PETRI_TRANSITIONS=206} [2024-06-03 19:06:20,136 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 143 predicate places. [2024-06-03 19:06:20,137 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 206 transitions, 2022 flow [2024-06-03 19:06:20,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:06:20,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:06:20,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:06:20,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-03 19:06:20,137 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:06:20,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:06:20,138 INFO L85 PathProgramCache]: Analyzing trace with hash 307618094, now seen corresponding path program 1 times [2024-06-03 19:06:20,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:06:20,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605581292] [2024-06-03 19:06:20,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:06:20,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:06:20,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:06:20,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:06:20,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:06:20,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605581292] [2024-06-03 19:06:20,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605581292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:06:20,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:06:20,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:06:20,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137762034] [2024-06-03 19:06:20,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:06:20,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:06:20,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:06:20,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:06:20,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:06:20,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:06:20,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 206 transitions, 2022 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:06:20,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:06:20,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:06:20,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:06:21,618 INFO L124 PetriNetUnfolderBase]: 2526/4060 cut-off events. [2024-06-03 19:06:21,618 INFO L125 PetriNetUnfolderBase]: For 282987/282993 co-relation queries the response was YES. [2024-06-03 19:06:21,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31585 conditions, 4060 events. 2526/4060 cut-off events. For 282987/282993 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 23384 event pairs, 650 based on Foata normal form. 7/4066 useless extension candidates. Maximal degree in co-relation 31495. Up to 3828 conditions per place. [2024-06-03 19:06:21,657 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 200 selfloop transitions, 23 changer transitions 0/228 dead transitions. [2024-06-03 19:06:21,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 228 transitions, 2590 flow [2024-06-03 19:06:21,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:06:21,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:06:21,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-03 19:06:21,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-06-03 19:06:21,658 INFO L175 Difference]: Start difference. First operand has 187 places, 206 transitions, 2022 flow. Second operand 7 states and 132 transitions. [2024-06-03 19:06:21,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 228 transitions, 2590 flow [2024-06-03 19:06:21,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 228 transitions, 2488 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-03 19:06:21,927 INFO L231 Difference]: Finished difference. Result has 189 places, 209 transitions, 2038 flow [2024-06-03 19:06:21,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1920, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2038, PETRI_PLACES=189, PETRI_TRANSITIONS=209} [2024-06-03 19:06:21,927 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 145 predicate places. [2024-06-03 19:06:21,928 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 209 transitions, 2038 flow [2024-06-03 19:06:21,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:06:21,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:06:21,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:06:21,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-03 19:06:21,928 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:06:21,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:06:21,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1879260942, now seen corresponding path program 2 times [2024-06-03 19:06:21,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:06:21,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413010359] [2024-06-03 19:06:21,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:06:21,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:06:21,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:06:22,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:06:22,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:06:22,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413010359] [2024-06-03 19:06:22,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413010359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:06:22,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:06:22,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:06:22,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011411224] [2024-06-03 19:06:22,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:06:22,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:06:22,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:06:22,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:06:22,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:06:22,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:06:22,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 209 transitions, 2038 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:06:22,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:06:22,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:06:22,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:06:23,488 INFO L124 PetriNetUnfolderBase]: 2539/4080 cut-off events. [2024-06-03 19:06:23,489 INFO L125 PetriNetUnfolderBase]: For 294261/294267 co-relation queries the response was YES. [2024-06-03 19:06:23,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32192 conditions, 4080 events. 2539/4080 cut-off events. For 294261/294267 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 23517 event pairs, 650 based on Foata normal form. 7/4086 useless extension candidates. Maximal degree in co-relation 32101. Up to 3834 conditions per place. [2024-06-03 19:06:23,532 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 200 selfloop transitions, 29 changer transitions 0/234 dead transitions. [2024-06-03 19:06:23,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 234 transitions, 2805 flow [2024-06-03 19:06:23,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:06:23,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:06:23,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-03 19:06:23,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43521594684385384 [2024-06-03 19:06:23,536 INFO L175 Difference]: Start difference. First operand has 189 places, 209 transitions, 2038 flow. Second operand 7 states and 131 transitions. [2024-06-03 19:06:23,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 234 transitions, 2805 flow [2024-06-03 19:06:23,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 234 transitions, 2709 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-03 19:06:23,816 INFO L231 Difference]: Finished difference. Result has 192 places, 217 transitions, 2173 flow [2024-06-03 19:06:23,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1942, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2173, PETRI_PLACES=192, PETRI_TRANSITIONS=217} [2024-06-03 19:06:23,817 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 148 predicate places. [2024-06-03 19:06:23,817 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 217 transitions, 2173 flow [2024-06-03 19:06:23,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:06:23,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:06:23,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:06:23,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-03 19:06:23,817 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:06:23,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:06:23,818 INFO L85 PathProgramCache]: Analyzing trace with hash 650157734, now seen corresponding path program 1 times [2024-06-03 19:06:23,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:06:23,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514719605] [2024-06-03 19:06:23,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:06:23,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:06:23,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:06:24,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:06:24,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:06:24,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514719605] [2024-06-03 19:06:24,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514719605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:06:24,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:06:24,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:06:24,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160164123] [2024-06-03 19:06:24,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:06:24,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:06:24,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:06:24,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:06:24,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:06:25,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:06:25,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 217 transitions, 2173 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:06:25,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:06:25,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:06:25,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:06:26,106 INFO L124 PetriNetUnfolderBase]: 2703/4392 cut-off events. [2024-06-03 19:06:26,106 INFO L125 PetriNetUnfolderBase]: For 323937/323941 co-relation queries the response was YES. [2024-06-03 19:06:26,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34239 conditions, 4392 events. 2703/4392 cut-off events. For 323937/323941 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 26095 event pairs, 645 based on Foata normal form. 12/4402 useless extension candidates. Maximal degree in co-relation 34146. Up to 3484 conditions per place. [2024-06-03 19:06:26,155 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 181 selfloop transitions, 82 changer transitions 0/268 dead transitions. [2024-06-03 19:06:26,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 268 transitions, 3041 flow [2024-06-03 19:06:26,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:06:26,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:06:26,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-03 19:06:26,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4627906976744186 [2024-06-03 19:06:26,157 INFO L175 Difference]: Start difference. First operand has 192 places, 217 transitions, 2173 flow. Second operand 10 states and 199 transitions. [2024-06-03 19:06:26,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 268 transitions, 3041 flow [2024-06-03 19:06:26,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 268 transitions, 2947 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-03 19:06:26,495 INFO L231 Difference]: Finished difference. Result has 201 places, 228 transitions, 2452 flow [2024-06-03 19:06:26,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2079, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2452, PETRI_PLACES=201, PETRI_TRANSITIONS=228} [2024-06-03 19:06:26,496 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 157 predicate places. [2024-06-03 19:06:26,496 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 228 transitions, 2452 flow [2024-06-03 19:06:26,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:06:26,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:06:26,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:06:26,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-03 19:06:26,497 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:06:26,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:06:26,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1879269870, now seen corresponding path program 1 times [2024-06-03 19:06:26,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:06:26,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772799622] [2024-06-03 19:06:26,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:06:26,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:06:26,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:06:27,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:06:27,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:06:27,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772799622] [2024-06-03 19:06:27,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772799622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:06:27,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:06:27,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:06:27,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254251020] [2024-06-03 19:06:27,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:06:27,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:06:27,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:06:27,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:06:27,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:06:27,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-03 19:06:27,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 228 transitions, 2452 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:06:27,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:06:27,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-03 19:06:27,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:06:28,730 INFO L124 PetriNetUnfolderBase]: 2466/4110 cut-off events. [2024-06-03 19:06:28,730 INFO L125 PetriNetUnfolderBase]: For 321327/321351 co-relation queries the response was YES. [2024-06-03 19:06:28,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33402 conditions, 4110 events. 2466/4110 cut-off events. For 321327/321351 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 25236 event pairs, 635 based on Foata normal form. 15/4070 useless extension candidates. Maximal degree in co-relation 33305. Up to 3575 conditions per place. [2024-06-03 19:06:28,767 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 170 selfloop transitions, 30 changer transitions 0/246 dead transitions. [2024-06-03 19:06:28,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 246 transitions, 2944 flow [2024-06-03 19:06:28,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:06:28,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:06:28,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-03 19:06:28,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-03 19:06:28,769 INFO L175 Difference]: Start difference. First operand has 201 places, 228 transitions, 2452 flow. Second operand 8 states and 155 transitions. [2024-06-03 19:06:28,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 246 transitions, 2944 flow [2024-06-03 19:06:29,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 246 transitions, 2770 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-03 19:06:29,077 INFO L231 Difference]: Finished difference. Result has 204 places, 231 transitions, 2400 flow [2024-06-03 19:06:29,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2278, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2400, PETRI_PLACES=204, PETRI_TRANSITIONS=231} [2024-06-03 19:06:29,078 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 160 predicate places. [2024-06-03 19:06:29,078 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 231 transitions, 2400 flow [2024-06-03 19:06:29,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:06:29,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:06:29,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:06:29,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-03 19:06:29,079 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:06:29,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:06:29,079 INFO L85 PathProgramCache]: Analyzing trace with hash 2025846262, now seen corresponding path program 3 times [2024-06-03 19:06:29,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:06:29,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653395131] [2024-06-03 19:06:29,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:06:29,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:06:29,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:06:29,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:06:29,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:06:29,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653395131] [2024-06-03 19:06:29,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653395131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:06:29,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:06:29,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:06:29,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167916248] [2024-06-03 19:06:29,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:06:29,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:06:29,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:06:29,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:06:29,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:06:29,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:06:29,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 231 transitions, 2400 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:06:29,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:06:29,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:06:29,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:06:30,706 INFO L124 PetriNetUnfolderBase]: 2710/4416 cut-off events. [2024-06-03 19:06:30,707 INFO L125 PetriNetUnfolderBase]: For 324167/324173 co-relation queries the response was YES. [2024-06-03 19:06:30,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34954 conditions, 4416 events. 2710/4416 cut-off events. For 324167/324173 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 26281 event pairs, 672 based on Foata normal form. 7/4422 useless extension candidates. Maximal degree in co-relation 34856. Up to 4140 conditions per place. [2024-06-03 19:06:30,748 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 222 selfloop transitions, 22 changer transitions 0/249 dead transitions. [2024-06-03 19:06:30,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 249 transitions, 2961 flow [2024-06-03 19:06:30,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:06:30,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:06:30,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-03 19:06:30,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 19:06:30,750 INFO L175 Difference]: Start difference. First operand has 204 places, 231 transitions, 2400 flow. Second operand 7 states and 129 transitions. [2024-06-03 19:06:30,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 249 transitions, 2961 flow [2024-06-03 19:06:31,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 249 transitions, 2811 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-03 19:06:31,056 INFO L231 Difference]: Finished difference. Result has 205 places, 232 transitions, 2319 flow [2024-06-03 19:06:31,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2260, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2319, PETRI_PLACES=205, PETRI_TRANSITIONS=232} [2024-06-03 19:06:31,058 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 161 predicate places. [2024-06-03 19:06:31,058 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 232 transitions, 2319 flow [2024-06-03 19:06:31,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:06:31,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:06:31,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:06:31,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-03 19:06:31,058 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:06:31,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:06:31,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1237935550, now seen corresponding path program 4 times [2024-06-03 19:06:31,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:06:31,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402711827] [2024-06-03 19:06:31,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:06:31,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:06:31,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:06:31,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:06:31,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:06:31,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402711827] [2024-06-03 19:06:31,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402711827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:06:31,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:06:31,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:06:31,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70845145] [2024-06-03 19:06:31,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:06:31,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:06:31,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:06:31,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:06:31,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:06:31,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:06:31,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 232 transitions, 2319 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:06:31,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:06:31,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:06:31,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:06:32,755 INFO L124 PetriNetUnfolderBase]: 2715/4424 cut-off events. [2024-06-03 19:06:32,755 INFO L125 PetriNetUnfolderBase]: For 333833/333841 co-relation queries the response was YES. [2024-06-03 19:06:32,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35081 conditions, 4424 events. 2715/4424 cut-off events. For 333833/333841 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 26395 event pairs, 672 based on Foata normal form. 9/4432 useless extension candidates. Maximal degree in co-relation 34982. Up to 4138 conditions per place. [2024-06-03 19:06:32,795 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 214 selfloop transitions, 30 changer transitions 0/249 dead transitions. [2024-06-03 19:06:32,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 249 transitions, 2925 flow [2024-06-03 19:06:32,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:06:32,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:06:32,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-03 19:06:32,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2024-06-03 19:06:32,797 INFO L175 Difference]: Start difference. First operand has 205 places, 232 transitions, 2319 flow. Second operand 7 states and 127 transitions. [2024-06-03 19:06:32,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 249 transitions, 2925 flow [2024-06-03 19:06:33,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 249 transitions, 2877 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-03 19:06:33,096 INFO L231 Difference]: Finished difference. Result has 207 places, 235 transitions, 2415 flow [2024-06-03 19:06:33,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2271, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2415, PETRI_PLACES=207, PETRI_TRANSITIONS=235} [2024-06-03 19:06:33,097 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 163 predicate places. [2024-06-03 19:06:33,097 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 235 transitions, 2415 flow [2024-06-03 19:06:33,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:06:33,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:06:33,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:06:33,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-03 19:06:33,098 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:06:33,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:06:33,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1385730394, now seen corresponding path program 2 times [2024-06-03 19:06:33,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:06:33,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603142291] [2024-06-03 19:06:33,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:06:33,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:06:33,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:06:34,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:06:34,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:06:34,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603142291] [2024-06-03 19:06:34,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603142291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:06:34,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:06:34,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:06:34,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950690655] [2024-06-03 19:06:34,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:06:34,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:06:34,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:06:34,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:06:34,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:06:34,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:06:34,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 235 transitions, 2415 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:06:34,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:06:34,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:06:34,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:06:35,423 INFO L124 PetriNetUnfolderBase]: 2838/4654 cut-off events. [2024-06-03 19:06:35,423 INFO L125 PetriNetUnfolderBase]: For 362948/362952 co-relation queries the response was YES. [2024-06-03 19:06:35,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36824 conditions, 4654 events. 2838/4654 cut-off events. For 362948/362952 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 28208 event pairs, 691 based on Foata normal form. 12/4664 useless extension candidates. Maximal degree in co-relation 36724. Up to 3806 conditions per place. [2024-06-03 19:06:35,474 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 194 selfloop transitions, 82 changer transitions 0/281 dead transitions. [2024-06-03 19:06:35,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 281 transitions, 3273 flow [2024-06-03 19:06:35,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:06:35,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:06:35,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-03 19:06:35,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45813953488372094 [2024-06-03 19:06:35,476 INFO L175 Difference]: Start difference. First operand has 207 places, 235 transitions, 2415 flow. Second operand 10 states and 197 transitions. [2024-06-03 19:06:35,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 281 transitions, 3273 flow [2024-06-03 19:06:35,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 281 transitions, 3151 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-03 19:06:35,833 INFO L231 Difference]: Finished difference. Result has 214 places, 243 transitions, 2623 flow [2024-06-03 19:06:35,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2293, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2623, PETRI_PLACES=214, PETRI_TRANSITIONS=243} [2024-06-03 19:06:35,833 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 170 predicate places. [2024-06-03 19:06:35,833 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 243 transitions, 2623 flow [2024-06-03 19:06:35,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:06:35,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:06:35,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:06:35,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-03 19:06:35,834 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:06:35,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:06:35,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1416057340, now seen corresponding path program 3 times [2024-06-03 19:06:35,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:06:35,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439234380] [2024-06-03 19:06:35,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:06:35,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:06:35,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:06:36,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:06:37,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:06:37,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439234380] [2024-06-03 19:06:37,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439234380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:06:37,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:06:37,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:06:37,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444602312] [2024-06-03 19:06:37,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:06:37,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:06:37,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:06:37,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:06:37,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:06:37,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:06:37,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 243 transitions, 2623 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:06:37,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:06:37,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:06:37,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:06:38,144 INFO L124 PetriNetUnfolderBase]: 2948/4854 cut-off events. [2024-06-03 19:06:38,145 INFO L125 PetriNetUnfolderBase]: For 382308/382312 co-relation queries the response was YES. [2024-06-03 19:06:38,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38801 conditions, 4854 events. 2948/4854 cut-off events. For 382308/382312 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 29906 event pairs, 716 based on Foata normal form. 12/4864 useless extension candidates. Maximal degree in co-relation 38698. Up to 4079 conditions per place. [2024-06-03 19:06:38,197 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 193 selfloop transitions, 88 changer transitions 0/286 dead transitions. [2024-06-03 19:06:38,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 286 transitions, 3465 flow [2024-06-03 19:06:38,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:06:38,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:06:38,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-03 19:06:38,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558139534883721 [2024-06-03 19:06:38,199 INFO L175 Difference]: Start difference. First operand has 214 places, 243 transitions, 2623 flow. Second operand 10 states and 196 transitions. [2024-06-03 19:06:38,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 286 transitions, 3465 flow [2024-06-03 19:06:38,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 286 transitions, 3271 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-03 19:06:38,675 INFO L231 Difference]: Finished difference. Result has 221 places, 249 transitions, 2751 flow [2024-06-03 19:06:38,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2437, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2751, PETRI_PLACES=221, PETRI_TRANSITIONS=249} [2024-06-03 19:06:38,676 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 177 predicate places. [2024-06-03 19:06:38,676 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 249 transitions, 2751 flow [2024-06-03 19:06:38,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:06:38,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:06:38,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:06:38,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-03 19:06:38,677 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:06:38,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:06:38,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1194412300, now seen corresponding path program 4 times [2024-06-03 19:06:38,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:06:38,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895801646] [2024-06-03 19:06:38,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:06:38,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:06:38,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:06:39,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:06:39,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:06:39,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895801646] [2024-06-03 19:06:39,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895801646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:06:39,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:06:39,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:06:39,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787249671] [2024-06-03 19:06:39,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:06:39,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:06:39,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:06:39,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:06:39,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:06:39,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:06:39,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 249 transitions, 2751 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:06:39,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:06:39,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:06:39,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:06:41,089 INFO L124 PetriNetUnfolderBase]: 3030/5016 cut-off events. [2024-06-03 19:06:41,090 INFO L125 PetriNetUnfolderBase]: For 396326/396330 co-relation queries the response was YES. [2024-06-03 19:06:41,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39850 conditions, 5016 events. 3030/5016 cut-off events. For 396326/396330 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 31393 event pairs, 746 based on Foata normal form. 12/5026 useless extension candidates. Maximal degree in co-relation 39744. Up to 4221 conditions per place. [2024-06-03 19:06:41,139 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 191 selfloop transitions, 94 changer transitions 0/290 dead transitions. [2024-06-03 19:06:41,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 290 transitions, 3585 flow [2024-06-03 19:06:41,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:06:41,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:06:41,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-03 19:06:41,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-03 19:06:41,140 INFO L175 Difference]: Start difference. First operand has 221 places, 249 transitions, 2751 flow. Second operand 10 states and 195 transitions. [2024-06-03 19:06:41,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 290 transitions, 3585 flow [2024-06-03 19:06:41,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 290 transitions, 3378 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-03 19:06:41,495 INFO L231 Difference]: Finished difference. Result has 227 places, 253 transitions, 2850 flow [2024-06-03 19:06:41,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2546, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2850, PETRI_PLACES=227, PETRI_TRANSITIONS=253} [2024-06-03 19:06:41,496 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 183 predicate places. [2024-06-03 19:06:41,496 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 253 transitions, 2850 flow [2024-06-03 19:06:41,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:06:41,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:06:41,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:06:41,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-03 19:06:41,497 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:06:41,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:06:41,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1759256922, now seen corresponding path program 5 times [2024-06-03 19:06:41,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:06:41,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040729586] [2024-06-03 19:06:41,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:06:41,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:06:41,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:06:42,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:06:42,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:06:42,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040729586] [2024-06-03 19:06:42,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040729586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:06:42,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:06:42,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:06:42,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011638757] [2024-06-03 19:06:42,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:06:42,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:06:42,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:06:42,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:06:42,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:06:42,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:06:42,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 253 transitions, 2850 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:06:42,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:06:42,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:06:42,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:06:43,937 INFO L124 PetriNetUnfolderBase]: 3010/4984 cut-off events. [2024-06-03 19:06:43,937 INFO L125 PetriNetUnfolderBase]: For 389366/389370 co-relation queries the response was YES. [2024-06-03 19:06:43,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38780 conditions, 4984 events. 3010/4984 cut-off events. For 389366/389370 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 31109 event pairs, 673 based on Foata normal form. 12/4994 useless extension candidates. Maximal degree in co-relation 38672. Up to 3266 conditions per place. [2024-06-03 19:06:43,989 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 176 selfloop transitions, 109 changer transitions 0/290 dead transitions. [2024-06-03 19:06:43,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 290 transitions, 3496 flow [2024-06-03 19:06:43,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:06:43,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:06:43,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-03 19:06:43,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511627906976744 [2024-06-03 19:06:43,990 INFO L175 Difference]: Start difference. First operand has 227 places, 253 transitions, 2850 flow. Second operand 10 states and 194 transitions. [2024-06-03 19:06:43,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 290 transitions, 3496 flow [2024-06-03 19:06:44,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 290 transitions, 3302 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-03 19:06:44,375 INFO L231 Difference]: Finished difference. Result has 231 places, 252 transitions, 2790 flow [2024-06-03 19:06:44,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2568, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2790, PETRI_PLACES=231, PETRI_TRANSITIONS=252} [2024-06-03 19:06:44,376 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 187 predicate places. [2024-06-03 19:06:44,376 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 252 transitions, 2790 flow [2024-06-03 19:06:44,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:06:44,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:06:44,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:06:44,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-03 19:06:44,377 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:06:44,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:06:44,377 INFO L85 PathProgramCache]: Analyzing trace with hash 897406734, now seen corresponding path program 5 times [2024-06-03 19:06:44,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:06:44,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454877482] [2024-06-03 19:06:44,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:06:44,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:06:44,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:06:45,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:06:45,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:06:45,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454877482] [2024-06-03 19:06:45,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454877482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:06:45,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:06:45,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:06:45,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526089376] [2024-06-03 19:06:45,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:06:45,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:06:45,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:06:45,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:06:45,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:06:45,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:06:45,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 252 transitions, 2790 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:06:45,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:06:45,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:06:45,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:06:46,209 INFO L124 PetriNetUnfolderBase]: 3015/4997 cut-off events. [2024-06-03 19:06:46,209 INFO L125 PetriNetUnfolderBase]: For 380139/380149 co-relation queries the response was YES. [2024-06-03 19:06:46,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38983 conditions, 4997 events. 3015/4997 cut-off events. For 380139/380149 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 31329 event pairs, 748 based on Foata normal form. 11/5007 useless extension candidates. Maximal degree in co-relation 38874. Up to 4629 conditions per place. [2024-06-03 19:06:46,266 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 222 selfloop transitions, 46 changer transitions 0/273 dead transitions. [2024-06-03 19:06:46,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 273 transitions, 3683 flow [2024-06-03 19:06:46,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:06:46,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:06:46,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-03 19:06:46,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-03 19:06:46,267 INFO L175 Difference]: Start difference. First operand has 231 places, 252 transitions, 2790 flow. Second operand 7 states and 126 transitions. [2024-06-03 19:06:46,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 273 transitions, 3683 flow [2024-06-03 19:06:46,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 273 transitions, 3264 flow, removed 25 selfloop flow, removed 11 redundant places. [2024-06-03 19:06:46,742 INFO L231 Difference]: Finished difference. Result has 228 places, 261 transitions, 2695 flow [2024-06-03 19:06:46,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2371, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2695, PETRI_PLACES=228, PETRI_TRANSITIONS=261} [2024-06-03 19:06:46,743 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 184 predicate places. [2024-06-03 19:06:46,743 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 261 transitions, 2695 flow [2024-06-03 19:06:46,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:06:46,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:06:46,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:06:46,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-03 19:06:46,744 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:06:46,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:06:46,744 INFO L85 PathProgramCache]: Analyzing trace with hash 891692814, now seen corresponding path program 6 times [2024-06-03 19:06:46,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:06:46,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040073229] [2024-06-03 19:06:46,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:06:46,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:06:46,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:06:47,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:06:47,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:06:47,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040073229] [2024-06-03 19:06:47,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040073229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:06:47,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:06:47,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:06:47,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138406582] [2024-06-03 19:06:47,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:06:47,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:06:47,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:06:47,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:06:47,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:06:47,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:06:47,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 261 transitions, 2695 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:06:47,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:06:47,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:06:47,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:06:48,587 INFO L124 PetriNetUnfolderBase]: 3012/4989 cut-off events. [2024-06-03 19:06:48,587 INFO L125 PetriNetUnfolderBase]: For 384430/384438 co-relation queries the response was YES. [2024-06-03 19:06:48,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37897 conditions, 4989 events. 3012/4989 cut-off events. For 384430/384438 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 31226 event pairs, 747 based on Foata normal form. 9/4997 useless extension candidates. Maximal degree in co-relation 37789. Up to 4626 conditions per place. [2024-06-03 19:06:48,637 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 219 selfloop transitions, 49 changer transitions 0/273 dead transitions. [2024-06-03 19:06:48,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 273 transitions, 3278 flow [2024-06-03 19:06:48,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:06:48,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:06:48,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-03 19:06:48,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-03 19:06:48,639 INFO L175 Difference]: Start difference. First operand has 228 places, 261 transitions, 2695 flow. Second operand 8 states and 137 transitions. [2024-06-03 19:06:48,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 273 transitions, 3278 flow [2024-06-03 19:06:49,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 273 transitions, 3090 flow, removed 78 selfloop flow, removed 3 redundant places. [2024-06-03 19:06:49,113 INFO L231 Difference]: Finished difference. Result has 234 places, 263 transitions, 2634 flow [2024-06-03 19:06:49,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2509, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2634, PETRI_PLACES=234, PETRI_TRANSITIONS=263} [2024-06-03 19:06:49,113 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 190 predicate places. [2024-06-03 19:06:49,113 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 263 transitions, 2634 flow [2024-06-03 19:06:49,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:06:49,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:06:49,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:06:49,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-03 19:06:49,114 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:06:49,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:06:49,114 INFO L85 PathProgramCache]: Analyzing trace with hash 707361482, now seen corresponding path program 2 times [2024-06-03 19:06:49,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:06:49,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763502023] [2024-06-03 19:06:49,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:06:49,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:06:49,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:06:50,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:06:50,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:06:50,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763502023] [2024-06-03 19:06:50,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763502023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:06:50,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:06:50,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:06:50,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529776297] [2024-06-03 19:06:50,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:06:50,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:06:50,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:06:50,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:06:50,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:06:50,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-03 19:06:50,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 263 transitions, 2634 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:06:50,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:06:50,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-03 19:06:50,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:06:51,238 INFO L124 PetriNetUnfolderBase]: 2750/4632 cut-off events. [2024-06-03 19:06:51,238 INFO L125 PetriNetUnfolderBase]: For 388933/388941 co-relation queries the response was YES. [2024-06-03 19:06:51,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35665 conditions, 4632 events. 2750/4632 cut-off events. For 388933/388941 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 29620 event pairs, 691 based on Foata normal form. 9/4561 useless extension candidates. Maximal degree in co-relation 35555. Up to 4053 conditions per place. [2024-06-03 19:06:51,298 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 185 selfloop transitions, 36 changer transitions 0/276 dead transitions. [2024-06-03 19:06:51,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 276 transitions, 3158 flow [2024-06-03 19:06:51,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:06:51,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:06:51,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 19:06:51,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-03 19:06:51,299 INFO L175 Difference]: Start difference. First operand has 234 places, 263 transitions, 2634 flow. Second operand 8 states and 150 transitions. [2024-06-03 19:06:51,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 276 transitions, 3158 flow [2024-06-03 19:06:51,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 276 transitions, 3043 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-03 19:06:51,837 INFO L231 Difference]: Finished difference. Result has 237 places, 266 transitions, 2659 flow [2024-06-03 19:06:51,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2519, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2659, PETRI_PLACES=237, PETRI_TRANSITIONS=266} [2024-06-03 19:06:51,837 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 193 predicate places. [2024-06-03 19:06:51,837 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 266 transitions, 2659 flow [2024-06-03 19:06:51,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:06:51,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:06:51,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:06:51,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-03 19:06:51,838 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:06:51,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:06:51,838 INFO L85 PathProgramCache]: Analyzing trace with hash 721185002, now seen corresponding path program 3 times [2024-06-03 19:06:51,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:06:51,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203966771] [2024-06-03 19:06:51,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:06:51,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:06:51,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:06:53,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:06:53,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:06:53,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203966771] [2024-06-03 19:06:53,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203966771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:06:53,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:06:53,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:06:53,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131049517] [2024-06-03 19:06:53,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:06:53,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:06:53,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:06:53,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:06:53,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:06:53,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-03 19:06:53,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 266 transitions, 2659 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:06:53,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:06:53,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-03 19:06:53,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:06:54,221 INFO L124 PetriNetUnfolderBase]: 2742/4636 cut-off events. [2024-06-03 19:06:54,221 INFO L125 PetriNetUnfolderBase]: For 401331/401363 co-relation queries the response was YES. [2024-06-03 19:06:54,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36130 conditions, 4636 events. 2742/4636 cut-off events. For 401331/401363 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 29829 event pairs, 689 based on Foata normal form. 12/4573 useless extension candidates. Maximal degree in co-relation 36019. Up to 4093 conditions per place. [2024-06-03 19:06:54,274 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 207 selfloop transitions, 18 changer transitions 0/280 dead transitions. [2024-06-03 19:06:54,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 280 transitions, 3204 flow [2024-06-03 19:06:54,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:06:54,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:06:54,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-03 19:06:54,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-03 19:06:54,276 INFO L175 Difference]: Start difference. First operand has 237 places, 266 transitions, 2659 flow. Second operand 8 states and 148 transitions. [2024-06-03 19:06:54,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 280 transitions, 3204 flow [2024-06-03 19:06:54,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 280 transitions, 3086 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-03 19:06:54,729 INFO L231 Difference]: Finished difference. Result has 240 places, 270 transitions, 2664 flow [2024-06-03 19:06:54,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2541, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2664, PETRI_PLACES=240, PETRI_TRANSITIONS=270} [2024-06-03 19:06:54,729 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 196 predicate places. [2024-06-03 19:06:54,730 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 270 transitions, 2664 flow [2024-06-03 19:06:54,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:06:54,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:06:54,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:06:54,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-03 19:06:54,730 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:06:54,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:06:54,731 INFO L85 PathProgramCache]: Analyzing trace with hash 721171052, now seen corresponding path program 4 times [2024-06-03 19:06:54,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:06:54,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454165252] [2024-06-03 19:06:54,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:06:54,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:06:54,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:06:56,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:06:56,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:06:56,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454165252] [2024-06-03 19:06:56,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454165252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:06:56,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:06:56,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:06:56,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959747298] [2024-06-03 19:06:56,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:06:56,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:06:56,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:06:56,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:06:56,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:06:56,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-03 19:06:56,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 270 transitions, 2664 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:06:56,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:06:56,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-03 19:06:56,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:06:57,089 INFO L124 PetriNetUnfolderBase]: 2720/4603 cut-off events. [2024-06-03 19:06:57,090 INFO L125 PetriNetUnfolderBase]: For 412305/412338 co-relation queries the response was YES. [2024-06-03 19:06:57,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36166 conditions, 4603 events. 2720/4603 cut-off events. For 412305/412338 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 29728 event pairs, 690 based on Foata normal form. 14/4538 useless extension candidates. Maximal degree in co-relation 36053. Up to 4020 conditions per place. [2024-06-03 19:06:57,137 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 175 selfloop transitions, 53 changer transitions 0/283 dead transitions. [2024-06-03 19:06:57,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 283 transitions, 3214 flow [2024-06-03 19:06:57,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:06:57,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:06:57,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-03 19:06:57,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-03 19:06:57,139 INFO L175 Difference]: Start difference. First operand has 240 places, 270 transitions, 2664 flow. Second operand 8 states and 153 transitions. [2024-06-03 19:06:57,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 283 transitions, 3214 flow [2024-06-03 19:06:57,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 283 transitions, 3110 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-03 19:06:57,572 INFO L231 Difference]: Finished difference. Result has 243 places, 273 transitions, 2746 flow [2024-06-03 19:06:57,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2560, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2746, PETRI_PLACES=243, PETRI_TRANSITIONS=273} [2024-06-03 19:06:57,572 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 199 predicate places. [2024-06-03 19:06:57,573 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 273 transitions, 2746 flow [2024-06-03 19:06:57,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:06:57,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:06:57,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:06:57,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-03 19:06:57,573 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:06:57,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:06:57,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1541545156, now seen corresponding path program 1 times [2024-06-03 19:06:57,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:06:57,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199787630] [2024-06-03 19:06:57,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:06:57,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:06:57,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:06:58,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:06:58,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:06:58,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199787630] [2024-06-03 19:06:58,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199787630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:06:58,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:06:58,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:06:58,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130969645] [2024-06-03 19:06:58,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:06:58,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:06:58,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:06:58,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:06:58,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:06:58,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:06:58,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 273 transitions, 2746 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:06:58,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:06:58,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:06:58,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:06:59,740 INFO L124 PetriNetUnfolderBase]: 2901/4877 cut-off events. [2024-06-03 19:06:59,741 INFO L125 PetriNetUnfolderBase]: For 424486/424488 co-relation queries the response was YES. [2024-06-03 19:06:59,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38054 conditions, 4877 events. 2901/4877 cut-off events. For 424486/424488 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 31129 event pairs, 706 based on Foata normal form. 3/4875 useless extension candidates. Maximal degree in co-relation 37940. Up to 4479 conditions per place. [2024-06-03 19:06:59,791 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 266 selfloop transitions, 19 changer transitions 0/295 dead transitions. [2024-06-03 19:06:59,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 295 transitions, 3442 flow [2024-06-03 19:06:59,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:06:59,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:06:59,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-03 19:06:59,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-03 19:06:59,793 INFO L175 Difference]: Start difference. First operand has 243 places, 273 transitions, 2746 flow. Second operand 9 states and 162 transitions. [2024-06-03 19:06:59,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 295 transitions, 3442 flow [2024-06-03 19:07:00,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 295 transitions, 3278 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-03 19:07:00,336 INFO L231 Difference]: Finished difference. Result has 246 places, 276 transitions, 2702 flow [2024-06-03 19:07:00,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2582, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2702, PETRI_PLACES=246, PETRI_TRANSITIONS=276} [2024-06-03 19:07:00,342 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 202 predicate places. [2024-06-03 19:07:00,342 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 276 transitions, 2702 flow [2024-06-03 19:07:00,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:07:00,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:07:00,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:07:00,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-03 19:07:00,343 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:07:00,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:07:00,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1541540320, now seen corresponding path program 1 times [2024-06-03 19:07:00,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:07:00,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027753085] [2024-06-03 19:07:00,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:07:00,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:07:00,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:07:01,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:07:01,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:07:01,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027753085] [2024-06-03 19:07:01,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027753085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:07:01,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:07:01,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:07:01,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125498219] [2024-06-03 19:07:01,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:07:01,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:07:01,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:07:01,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:07:01,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:07:01,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:07:01,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 276 transitions, 2702 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:07:01,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:07:01,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:07:01,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:07:02,544 INFO L124 PetriNetUnfolderBase]: 2911/4895 cut-off events. [2024-06-03 19:07:02,545 INFO L125 PetriNetUnfolderBase]: For 443689/443693 co-relation queries the response was YES. [2024-06-03 19:07:02,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38564 conditions, 4895 events. 2911/4895 cut-off events. For 443689/443693 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 31295 event pairs, 705 based on Foata normal form. 8/4894 useless extension candidates. Maximal degree in co-relation 38449. Up to 4493 conditions per place. [2024-06-03 19:07:02,601 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 268 selfloop transitions, 19 changer transitions 0/297 dead transitions. [2024-06-03 19:07:02,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 297 transitions, 3406 flow [2024-06-03 19:07:02,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:07:02,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:07:02,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-03 19:07:02,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-03 19:07:02,603 INFO L175 Difference]: Start difference. First operand has 246 places, 276 transitions, 2702 flow. Second operand 8 states and 149 transitions. [2024-06-03 19:07:02,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 297 transitions, 3406 flow [2024-06-03 19:07:03,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 297 transitions, 3308 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-03 19:07:03,154 INFO L231 Difference]: Finished difference. Result has 247 places, 280 transitions, 2731 flow [2024-06-03 19:07:03,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2604, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2731, PETRI_PLACES=247, PETRI_TRANSITIONS=280} [2024-06-03 19:07:03,155 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 203 predicate places. [2024-06-03 19:07:03,155 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 280 transitions, 2731 flow [2024-06-03 19:07:03,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:07:03,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:07:03,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:07:03,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-03 19:07:03,155 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:07:03,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:07:03,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1536898690, now seen corresponding path program 2 times [2024-06-03 19:07:03,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:07:03,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202479253] [2024-06-03 19:07:03,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:07:03,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:07:03,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:07:04,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:07:04,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:07:04,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202479253] [2024-06-03 19:07:04,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202479253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:07:04,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:07:04,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:07:04,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497920724] [2024-06-03 19:07:04,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:07:04,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:07:04,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:07:04,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:07:04,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:07:04,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:07:04,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 280 transitions, 2731 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:07:04,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:07:04,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:07:04,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:07:05,400 INFO L124 PetriNetUnfolderBase]: 2929/4923 cut-off events. [2024-06-03 19:07:05,401 INFO L125 PetriNetUnfolderBase]: For 457270/457276 co-relation queries the response was YES. [2024-06-03 19:07:05,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39522 conditions, 4923 events. 2929/4923 cut-off events. For 457270/457276 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 31407 event pairs, 705 based on Foata normal form. 10/4923 useless extension candidates. Maximal degree in co-relation 39406. Up to 4504 conditions per place. [2024-06-03 19:07:05,462 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 266 selfloop transitions, 24 changer transitions 0/300 dead transitions. [2024-06-03 19:07:05,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 300 transitions, 3459 flow [2024-06-03 19:07:05,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:07:05,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:07:05,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 19:07:05,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-03 19:07:05,463 INFO L175 Difference]: Start difference. First operand has 247 places, 280 transitions, 2731 flow. Second operand 8 states and 150 transitions. [2024-06-03 19:07:05,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 300 transitions, 3459 flow [2024-06-03 19:07:06,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 300 transitions, 3360 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-03 19:07:06,095 INFO L231 Difference]: Finished difference. Result has 249 places, 284 transitions, 2767 flow [2024-06-03 19:07:06,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2632, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2767, PETRI_PLACES=249, PETRI_TRANSITIONS=284} [2024-06-03 19:07:06,095 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 205 predicate places. [2024-06-03 19:07:06,095 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 284 transitions, 2767 flow [2024-06-03 19:07:06,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:07:06,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:07:06,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:07:06,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-03 19:07:06,096 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:07:06,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:07:06,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1213867978, now seen corresponding path program 3 times [2024-06-03 19:07:06,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:07:06,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194188283] [2024-06-03 19:07:06,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:07:06,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:07:06,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:07:07,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:07:07,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:07:07,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194188283] [2024-06-03 19:07:07,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194188283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:07:07,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:07:07,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:07:07,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538537088] [2024-06-03 19:07:07,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:07:07,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:07:07,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:07:07,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:07:07,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:07:07,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:07:07,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 284 transitions, 2767 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:07:07,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:07:07,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:07:07,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:07:08,322 INFO L124 PetriNetUnfolderBase]: 2934/4930 cut-off events. [2024-06-03 19:07:08,322 INFO L125 PetriNetUnfolderBase]: For 460222/460230 co-relation queries the response was YES. [2024-06-03 19:07:08,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40284 conditions, 4930 events. 2934/4930 cut-off events. For 460222/460230 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 31429 event pairs, 705 based on Foata normal form. 5/4925 useless extension candidates. Maximal degree in co-relation 40167. Up to 4505 conditions per place. [2024-06-03 19:07:08,382 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 262 selfloop transitions, 33 changer transitions 0/305 dead transitions. [2024-06-03 19:07:08,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 305 transitions, 3564 flow [2024-06-03 19:07:08,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:07:08,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:07:08,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-03 19:07:08,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-03 19:07:08,383 INFO L175 Difference]: Start difference. First operand has 249 places, 284 transitions, 2767 flow. Second operand 8 states and 149 transitions. [2024-06-03 19:07:08,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 305 transitions, 3564 flow [2024-06-03 19:07:09,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 305 transitions, 3414 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-03 19:07:09,160 INFO L231 Difference]: Finished difference. Result has 252 places, 291 transitions, 2872 flow [2024-06-03 19:07:09,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2670, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2872, PETRI_PLACES=252, PETRI_TRANSITIONS=291} [2024-06-03 19:07:09,161 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 208 predicate places. [2024-06-03 19:07:09,161 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 291 transitions, 2872 flow [2024-06-03 19:07:09,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:07:09,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:07:09,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:07:09,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-03 19:07:09,162 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:07:09,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:07:09,162 INFO L85 PathProgramCache]: Analyzing trace with hash 897421366, now seen corresponding path program 4 times [2024-06-03 19:07:09,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:07:09,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880315737] [2024-06-03 19:07:09,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:07:09,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:07:09,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:07:10,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:07:10,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:07:10,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880315737] [2024-06-03 19:07:10,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880315737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:07:10,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:07:10,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:07:10,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43174410] [2024-06-03 19:07:10,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:07:10,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:07:10,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:07:10,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:07:10,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:07:10,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:07:10,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 291 transitions, 2872 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:07:10,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:07:10,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:07:10,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:07:11,359 INFO L124 PetriNetUnfolderBase]: 2961/4973 cut-off events. [2024-06-03 19:07:11,359 INFO L125 PetriNetUnfolderBase]: For 485409/485433 co-relation queries the response was YES. [2024-06-03 19:07:11,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41398 conditions, 4973 events. 2961/4973 cut-off events. For 485409/485433 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 31720 event pairs, 715 based on Foata normal form. 12/4975 useless extension candidates. Maximal degree in co-relation 41279. Up to 4530 conditions per place. [2024-06-03 19:07:11,421 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 265 selfloop transitions, 36 changer transitions 0/311 dead transitions. [2024-06-03 19:07:11,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 311 transitions, 3846 flow [2024-06-03 19:07:11,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:07:11,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:07:11,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-03 19:07:11,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-03 19:07:11,422 INFO L175 Difference]: Start difference. First operand has 252 places, 291 transitions, 2872 flow. Second operand 8 states and 151 transitions. [2024-06-03 19:07:11,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 311 transitions, 3846 flow [2024-06-03 19:07:12,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 311 transitions, 3755 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-03 19:07:12,148 INFO L231 Difference]: Finished difference. Result has 257 places, 298 transitions, 3044 flow [2024-06-03 19:07:12,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2781, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3044, PETRI_PLACES=257, PETRI_TRANSITIONS=298} [2024-06-03 19:07:12,151 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 213 predicate places. [2024-06-03 19:07:12,158 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 298 transitions, 3044 flow [2024-06-03 19:07:12,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:07:12,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:07:12,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:07:12,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-03 19:07:12,159 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:07:12,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:07:12,159 INFO L85 PathProgramCache]: Analyzing trace with hash 897414856, now seen corresponding path program 5 times [2024-06-03 19:07:12,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:07:12,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352933831] [2024-06-03 19:07:12,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:07:12,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:07:12,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:07:13,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:07:13,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:07:13,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352933831] [2024-06-03 19:07:13,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352933831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:07:13,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:07:13,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:07:13,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895193974] [2024-06-03 19:07:13,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:07:13,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:07:13,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:07:13,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:07:13,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:07:13,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:07:13,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 298 transitions, 3044 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:07:13,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:07:13,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:07:13,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:07:14,328 INFO L124 PetriNetUnfolderBase]: 2959/4971 cut-off events. [2024-06-03 19:07:14,329 INFO L125 PetriNetUnfolderBase]: For 503843/503861 co-relation queries the response was YES. [2024-06-03 19:07:14,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42068 conditions, 4971 events. 2959/4971 cut-off events. For 503843/503861 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 31720 event pairs, 713 based on Foata normal form. 15/4976 useless extension candidates. Maximal degree in co-relation 41946. Up to 4534 conditions per place. [2024-06-03 19:07:14,386 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 270 selfloop transitions, 34 changer transitions 0/314 dead transitions. [2024-06-03 19:07:14,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 314 transitions, 3810 flow [2024-06-03 19:07:14,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:07:14,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:07:14,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-03 19:07:14,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-03 19:07:14,387 INFO L175 Difference]: Start difference. First operand has 257 places, 298 transitions, 3044 flow. Second operand 8 states and 149 transitions. [2024-06-03 19:07:14,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 314 transitions, 3810 flow [2024-06-03 19:07:15,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 314 transitions, 3621 flow, removed 77 selfloop flow, removed 5 redundant places. [2024-06-03 19:07:15,121 INFO L231 Difference]: Finished difference. Result has 260 places, 302 transitions, 3033 flow [2024-06-03 19:07:15,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2855, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3033, PETRI_PLACES=260, PETRI_TRANSITIONS=302} [2024-06-03 19:07:15,122 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 216 predicate places. [2024-06-03 19:07:15,122 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 302 transitions, 3033 flow [2024-06-03 19:07:15,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:07:15,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:07:15,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:07:15,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-03 19:07:15,123 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:07:15,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:07:15,124 INFO L85 PathProgramCache]: Analyzing trace with hash 721355316, now seen corresponding path program 6 times [2024-06-03 19:07:15,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:07:15,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235184967] [2024-06-03 19:07:15,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:07:15,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:07:15,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:07:16,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:07:16,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:07:16,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235184967] [2024-06-03 19:07:16,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235184967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:07:16,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:07:16,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:07:16,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659620763] [2024-06-03 19:07:16,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:07:16,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:07:16,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:07:16,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:07:16,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:07:16,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:07:16,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 302 transitions, 3033 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:07:16,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:07:16,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:07:16,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:07:17,391 INFO L124 PetriNetUnfolderBase]: 2978/4997 cut-off events. [2024-06-03 19:07:17,391 INFO L125 PetriNetUnfolderBase]: For 517361/517379 co-relation queries the response was YES. [2024-06-03 19:07:17,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43057 conditions, 4997 events. 2978/4997 cut-off events. For 517361/517379 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 31947 event pairs, 710 based on Foata normal form. 11/4999 useless extension candidates. Maximal degree in co-relation 42934. Up to 4481 conditions per place. [2024-06-03 19:07:17,454 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 248 selfloop transitions, 69 changer transitions 0/327 dead transitions. [2024-06-03 19:07:17,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 327 transitions, 4325 flow [2024-06-03 19:07:17,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:07:17,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:07:17,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-03 19:07:17,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-03 19:07:17,456 INFO L175 Difference]: Start difference. First operand has 260 places, 302 transitions, 3033 flow. Second operand 8 states and 154 transitions. [2024-06-03 19:07:17,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 327 transitions, 4325 flow [2024-06-03 19:07:18,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 327 transitions, 4183 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-03 19:07:18,183 INFO L231 Difference]: Finished difference. Result has 264 places, 312 transitions, 3354 flow [2024-06-03 19:07:18,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2891, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3354, PETRI_PLACES=264, PETRI_TRANSITIONS=312} [2024-06-03 19:07:18,184 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 220 predicate places. [2024-06-03 19:07:18,184 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 312 transitions, 3354 flow [2024-06-03 19:07:18,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:07:18,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:07:18,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:07:18,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-03 19:07:18,185 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:07:18,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:07:18,185 INFO L85 PathProgramCache]: Analyzing trace with hash 721663146, now seen corresponding path program 1 times [2024-06-03 19:07:18,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:07:18,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568616488] [2024-06-03 19:07:18,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:07:18,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:07:18,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:07:19,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:07:19,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:07:19,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568616488] [2024-06-03 19:07:19,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568616488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:07:19,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:07:19,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:07:19,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759294140] [2024-06-03 19:07:19,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:07:19,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:07:19,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:07:19,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:07:19,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:07:19,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-03 19:07:19,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 312 transitions, 3354 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:07:19,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:07:19,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-03 19:07:19,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:07:20,901 INFO L124 PetriNetUnfolderBase]: 2828/4757 cut-off events. [2024-06-03 19:07:20,901 INFO L125 PetriNetUnfolderBase]: For 525587/525622 co-relation queries the response was YES. [2024-06-03 19:07:20,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43056 conditions, 4757 events. 2828/4757 cut-off events. For 525587/525622 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 30513 event pairs, 684 based on Foata normal form. 21/4696 useless extension candidates. Maximal degree in co-relation 42930. Up to 4220 conditions per place. [2024-06-03 19:07:20,964 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 250 selfloop transitions, 20 changer transitions 0/326 dead transitions. [2024-06-03 19:07:20,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 326 transitions, 3998 flow [2024-06-03 19:07:20,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:07:20,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:07:20,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-03 19:07:20,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-03 19:07:20,966 INFO L175 Difference]: Start difference. First operand has 264 places, 312 transitions, 3354 flow. Second operand 9 states and 164 transitions. [2024-06-03 19:07:20,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 326 transitions, 3998 flow [2024-06-03 19:07:21,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 326 transitions, 3891 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-03 19:07:21,783 INFO L231 Difference]: Finished difference. Result has 270 places, 314 transitions, 3370 flow [2024-06-03 19:07:21,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3247, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3370, PETRI_PLACES=270, PETRI_TRANSITIONS=314} [2024-06-03 19:07:21,786 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 226 predicate places. [2024-06-03 19:07:21,786 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 314 transitions, 3370 flow [2024-06-03 19:07:21,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:07:21,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:07:21,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:07:21,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-03 19:07:21,787 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:07:21,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:07:21,787 INFO L85 PathProgramCache]: Analyzing trace with hash 2055619554, now seen corresponding path program 1 times [2024-06-03 19:07:21,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:07:21,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101997614] [2024-06-03 19:07:21,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:07:21,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:07:21,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:07:22,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:07:22,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:07:22,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101997614] [2024-06-03 19:07:22,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101997614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:07:22,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:07:22,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:07:22,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568001207] [2024-06-03 19:07:22,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:07:22,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:07:22,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:07:22,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:07:22,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:07:22,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:07:22,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 314 transitions, 3370 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:07:22,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:07:22,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:07:22,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:07:24,032 INFO L124 PetriNetUnfolderBase]: 3140/5168 cut-off events. [2024-06-03 19:07:24,032 INFO L125 PetriNetUnfolderBase]: For 534103/534107 co-relation queries the response was YES. [2024-06-03 19:07:24,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45520 conditions, 5168 events. 3140/5168 cut-off events. For 534103/534107 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 32223 event pairs, 733 based on Foata normal form. 5/5172 useless extension candidates. Maximal degree in co-relation 45392. Up to 4814 conditions per place. [2024-06-03 19:07:24,098 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 305 selfloop transitions, 31 changer transitions 0/341 dead transitions. [2024-06-03 19:07:24,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 341 transitions, 4204 flow [2024-06-03 19:07:24,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:07:24,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:07:24,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-03 19:07:24,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-03 19:07:24,100 INFO L175 Difference]: Start difference. First operand has 270 places, 314 transitions, 3370 flow. Second operand 8 states and 149 transitions. [2024-06-03 19:07:24,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 341 transitions, 4204 flow [2024-06-03 19:07:24,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 341 transitions, 4053 flow, removed 41 selfloop flow, removed 9 redundant places. [2024-06-03 19:07:24,839 INFO L231 Difference]: Finished difference. Result has 269 places, 317 transitions, 3382 flow [2024-06-03 19:07:24,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3219, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3382, PETRI_PLACES=269, PETRI_TRANSITIONS=317} [2024-06-03 19:07:24,840 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 225 predicate places. [2024-06-03 19:07:24,840 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 317 transitions, 3382 flow [2024-06-03 19:07:24,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:07:24,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:07:24,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:07:24,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-03 19:07:24,841 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:07:24,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:07:24,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1883296856, now seen corresponding path program 2 times [2024-06-03 19:07:24,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:07:24,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519904833] [2024-06-03 19:07:24,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:07:24,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:07:24,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:07:25,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:07:25,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:07:25,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519904833] [2024-06-03 19:07:25,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519904833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:07:25,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:07:25,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:07:25,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272306217] [2024-06-03 19:07:25,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:07:25,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:07:25,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:07:25,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:07:25,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:07:25,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:07:25,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 317 transitions, 3382 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:07:25,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:07:25,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:07:25,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:07:27,082 INFO L124 PetriNetUnfolderBase]: 3150/5184 cut-off events. [2024-06-03 19:07:27,082 INFO L125 PetriNetUnfolderBase]: For 542882/542886 co-relation queries the response was YES. [2024-06-03 19:07:27,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45611 conditions, 5184 events. 3150/5184 cut-off events. For 542882/542886 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 32323 event pairs, 733 based on Foata normal form. 5/5188 useless extension candidates. Maximal degree in co-relation 45484. Up to 4818 conditions per place. [2024-06-03 19:07:27,144 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 306 selfloop transitions, 37 changer transitions 0/348 dead transitions. [2024-06-03 19:07:27,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 348 transitions, 4258 flow [2024-06-03 19:07:27,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:07:27,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:07:27,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-03 19:07:27,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-03 19:07:27,145 INFO L175 Difference]: Start difference. First operand has 269 places, 317 transitions, 3382 flow. Second operand 9 states and 164 transitions. [2024-06-03 19:07:27,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 348 transitions, 4258 flow [2024-06-03 19:07:27,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 348 transitions, 4119 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-03 19:07:27,863 INFO L231 Difference]: Finished difference. Result has 273 places, 323 transitions, 3460 flow [2024-06-03 19:07:27,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3243, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3460, PETRI_PLACES=273, PETRI_TRANSITIONS=323} [2024-06-03 19:07:27,864 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 229 predicate places. [2024-06-03 19:07:27,864 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 323 transitions, 3460 flow [2024-06-03 19:07:27,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:07:27,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:07:27,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:07:27,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-03 19:07:27,865 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:07:27,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:07:27,865 INFO L85 PathProgramCache]: Analyzing trace with hash -2079433856, now seen corresponding path program 3 times [2024-06-03 19:07:27,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:07:27,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413698007] [2024-06-03 19:07:27,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:07:27,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:07:27,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:07:28,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:07:28,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:07:28,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413698007] [2024-06-03 19:07:28,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413698007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:07:28,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:07:28,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:07:28,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653074690] [2024-06-03 19:07:28,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:07:28,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:07:28,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:07:28,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:07:28,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:07:28,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:07:28,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 323 transitions, 3460 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:07:28,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:07:28,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:07:28,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:07:29,866 INFO L124 PetriNetUnfolderBase]: 3155/5192 cut-off events. [2024-06-03 19:07:29,866 INFO L125 PetriNetUnfolderBase]: For 559105/559107 co-relation queries the response was YES. [2024-06-03 19:07:29,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46208 conditions, 5192 events. 3155/5192 cut-off events. For 559105/559107 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 32387 event pairs, 741 based on Foata normal form. 3/5194 useless extension candidates. Maximal degree in co-relation 46079. Up to 4787 conditions per place. [2024-06-03 19:07:29,926 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 301 selfloop transitions, 41 changer transitions 0/347 dead transitions. [2024-06-03 19:07:29,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 347 transitions, 4306 flow [2024-06-03 19:07:29,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:07:29,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:07:29,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 19:07:29,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-03 19:07:29,927 INFO L175 Difference]: Start difference. First operand has 273 places, 323 transitions, 3460 flow. Second operand 8 states and 150 transitions. [2024-06-03 19:07:29,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 347 transitions, 4306 flow [2024-06-03 19:07:30,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 347 transitions, 4155 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-03 19:07:30,689 INFO L231 Difference]: Finished difference. Result has 275 places, 326 transitions, 3503 flow [2024-06-03 19:07:30,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3309, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3503, PETRI_PLACES=275, PETRI_TRANSITIONS=326} [2024-06-03 19:07:30,689 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 231 predicate places. [2024-06-03 19:07:30,689 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 326 transitions, 3503 flow [2024-06-03 19:07:30,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:07:30,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:07:30,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:07:30,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-03 19:07:30,690 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:07:30,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:07:30,690 INFO L85 PathProgramCache]: Analyzing trace with hash -2123877826, now seen corresponding path program 1 times [2024-06-03 19:07:30,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:07:30,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281655893] [2024-06-03 19:07:30,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:07:30,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:07:30,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:07:31,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:07:31,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:07:31,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281655893] [2024-06-03 19:07:31,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281655893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:07:31,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:07:31,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:07:31,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434648878] [2024-06-03 19:07:31,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:07:31,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:07:31,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:07:31,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:07:31,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:07:31,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:07:31,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 326 transitions, 3503 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:07:31,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:07:31,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:07:31,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:07:32,722 INFO L124 PetriNetUnfolderBase]: 3165/5211 cut-off events. [2024-06-03 19:07:32,722 INFO L125 PetriNetUnfolderBase]: For 577451/577457 co-relation queries the response was YES. [2024-06-03 19:07:32,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46862 conditions, 5211 events. 3165/5211 cut-off events. For 577451/577457 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 32510 event pairs, 740 based on Foata normal form. 8/5218 useless extension candidates. Maximal degree in co-relation 46732. Up to 4834 conditions per place. [2024-06-03 19:07:32,781 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 313 selfloop transitions, 34 changer transitions 0/352 dead transitions. [2024-06-03 19:07:32,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 352 transitions, 4367 flow [2024-06-03 19:07:32,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:07:32,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:07:32,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-03 19:07:32,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-03 19:07:32,782 INFO L175 Difference]: Start difference. First operand has 275 places, 326 transitions, 3503 flow. Second operand 8 states and 151 transitions. [2024-06-03 19:07:32,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 352 transitions, 4367 flow [2024-06-03 19:07:33,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 352 transitions, 4195 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-03 19:07:33,502 INFO L231 Difference]: Finished difference. Result has 277 places, 329 transitions, 3489 flow [2024-06-03 19:07:33,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3331, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3489, PETRI_PLACES=277, PETRI_TRANSITIONS=329} [2024-06-03 19:07:33,503 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 233 predicate places. [2024-06-03 19:07:33,503 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 329 transitions, 3489 flow [2024-06-03 19:07:33,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:07:33,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:07:33,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:07:33,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-03 19:07:33,503 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:07:33,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:07:33,504 INFO L85 PathProgramCache]: Analyzing trace with hash -2079105566, now seen corresponding path program 4 times [2024-06-03 19:07:33,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:07:33,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474975651] [2024-06-03 19:07:33,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:07:33,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:07:33,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:07:34,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:07:34,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:07:34,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474975651] [2024-06-03 19:07:34,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474975651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:07:34,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:07:34,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:07:34,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930587092] [2024-06-03 19:07:34,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:07:34,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:07:34,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:07:34,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:07:34,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:07:34,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:07:34,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 329 transitions, 3489 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:07:34,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:07:34,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:07:34,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:07:35,601 INFO L124 PetriNetUnfolderBase]: 3170/5217 cut-off events. [2024-06-03 19:07:35,602 INFO L125 PetriNetUnfolderBase]: For 590013/590015 co-relation queries the response was YES. [2024-06-03 19:07:35,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47466 conditions, 5217 events. 3170/5217 cut-off events. For 590013/590015 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 32492 event pairs, 740 based on Foata normal form. 3/5219 useless extension candidates. Maximal degree in co-relation 47335. Up to 4797 conditions per place. [2024-06-03 19:07:35,780 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 296 selfloop transitions, 49 changer transitions 0/350 dead transitions. [2024-06-03 19:07:35,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 350 transitions, 4339 flow [2024-06-03 19:07:35,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:07:35,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:07:35,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-03 19:07:35,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-03 19:07:35,783 INFO L175 Difference]: Start difference. First operand has 277 places, 329 transitions, 3489 flow. Second operand 8 states and 148 transitions. [2024-06-03 19:07:35,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 350 transitions, 4339 flow [2024-06-03 19:07:36,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 350 transitions, 4230 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-03 19:07:36,618 INFO L231 Difference]: Finished difference. Result has 280 places, 332 transitions, 3598 flow [2024-06-03 19:07:36,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3380, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3598, PETRI_PLACES=280, PETRI_TRANSITIONS=332} [2024-06-03 19:07:36,619 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 236 predicate places. [2024-06-03 19:07:36,619 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 332 transitions, 3598 flow [2024-06-03 19:07:36,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:07:36,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:07:36,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:07:36,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-03 19:07:36,620 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:07:36,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:07:36,620 INFO L85 PathProgramCache]: Analyzing trace with hash -2079105163, now seen corresponding path program 1 times [2024-06-03 19:07:36,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:07:36,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017922503] [2024-06-03 19:07:36,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:07:36,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:07:36,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:07:37,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:07:37,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:07:37,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017922503] [2024-06-03 19:07:37,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017922503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:07:37,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:07:37,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:07:37,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44225811] [2024-06-03 19:07:37,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:07:37,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:07:37,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:07:37,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:07:37,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:07:38,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:07:38,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 332 transitions, 3598 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:07:38,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:07:38,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:07:38,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:07:39,091 INFO L124 PetriNetUnfolderBase]: 3175/5226 cut-off events. [2024-06-03 19:07:39,092 INFO L125 PetriNetUnfolderBase]: For 606913/606919 co-relation queries the response was YES. [2024-06-03 19:07:39,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48030 conditions, 5226 events. 3175/5226 cut-off events. For 606913/606919 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 32616 event pairs, 735 based on Foata normal form. 7/5232 useless extension candidates. Maximal degree in co-relation 47898. Up to 4884 conditions per place. [2024-06-03 19:07:39,160 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 322 selfloop transitions, 27 changer transitions 0/354 dead transitions. [2024-06-03 19:07:39,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 354 transitions, 4424 flow [2024-06-03 19:07:39,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:07:39,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:07:39,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-03 19:07:39,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-03 19:07:39,161 INFO L175 Difference]: Start difference. First operand has 280 places, 332 transitions, 3598 flow. Second operand 8 states and 145 transitions. [2024-06-03 19:07:39,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 354 transitions, 4424 flow [2024-06-03 19:07:40,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 354 transitions, 4228 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-03 19:07:40,013 INFO L231 Difference]: Finished difference. Result has 282 places, 335 transitions, 3538 flow [2024-06-03 19:07:40,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3402, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3538, PETRI_PLACES=282, PETRI_TRANSITIONS=335} [2024-06-03 19:07:40,014 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 238 predicate places. [2024-06-03 19:07:40,014 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 335 transitions, 3538 flow [2024-06-03 19:07:40,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:07:40,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:07:40,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:07:40,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-03 19:07:40,016 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:07:40,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:07:40,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1879803590, now seen corresponding path program 2 times [2024-06-03 19:07:40,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:07:40,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589075288] [2024-06-03 19:07:40,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:07:40,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:07:40,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:07:40,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:07:40,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:07:40,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589075288] [2024-06-03 19:07:40,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589075288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:07:40,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:07:40,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:07:40,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445978731] [2024-06-03 19:07:40,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:07:40,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:07:40,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:07:40,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:07:40,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:07:40,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:07:40,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 335 transitions, 3538 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:07:40,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:07:40,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:07:40,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:07:42,003 INFO L124 PetriNetUnfolderBase]: 3185/5243 cut-off events. [2024-06-03 19:07:42,004 INFO L125 PetriNetUnfolderBase]: For 622568/622574 co-relation queries the response was YES. [2024-06-03 19:07:42,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48500 conditions, 5243 events. 3185/5243 cut-off events. For 622568/622574 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 32718 event pairs, 739 based on Foata normal form. 8/5250 useless extension candidates. Maximal degree in co-relation 48367. Up to 4853 conditions per place. [2024-06-03 19:07:42,075 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 315 selfloop transitions, 39 changer transitions 0/359 dead transitions. [2024-06-03 19:07:42,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 359 transitions, 4440 flow [2024-06-03 19:07:42,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:07:42,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:07:42,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-03 19:07:42,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-03 19:07:42,077 INFO L175 Difference]: Start difference. First operand has 282 places, 335 transitions, 3538 flow. Second operand 8 states and 151 transitions. [2024-06-03 19:07:42,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 359 transitions, 4440 flow [2024-06-03 19:07:42,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 359 transitions, 4326 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-03 19:07:42,810 INFO L231 Difference]: Finished difference. Result has 284 places, 338 transitions, 3602 flow [2024-06-03 19:07:42,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3424, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3602, PETRI_PLACES=284, PETRI_TRANSITIONS=338} [2024-06-03 19:07:42,811 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 240 predicate places. [2024-06-03 19:07:42,811 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 338 transitions, 3602 flow [2024-06-03 19:07:42,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:07:42,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:07:42,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:07:42,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-03 19:07:42,811 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:07:42,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:07:42,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1872451940, now seen corresponding path program 3 times [2024-06-03 19:07:42,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:07:42,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351690542] [2024-06-03 19:07:42,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:07:42,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:07:42,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:07:43,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:07:43,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:07:43,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351690542] [2024-06-03 19:07:43,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351690542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:07:43,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:07:43,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:07:43,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715878303] [2024-06-03 19:07:43,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:07:43,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:07:43,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:07:43,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:07:43,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:07:43,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:07:43,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 338 transitions, 3602 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:07:43,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:07:43,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:07:43,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:07:44,894 INFO L124 PetriNetUnfolderBase]: 3211/5283 cut-off events. [2024-06-03 19:07:44,895 INFO L125 PetriNetUnfolderBase]: For 647831/647837 co-relation queries the response was YES. [2024-06-03 19:07:44,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49763 conditions, 5283 events. 3211/5283 cut-off events. For 647831/647837 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 33005 event pairs, 740 based on Foata normal form. 8/5290 useless extension candidates. Maximal degree in co-relation 49629. Up to 4859 conditions per place. [2024-06-03 19:07:44,966 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 308 selfloop transitions, 50 changer transitions 0/363 dead transitions. [2024-06-03 19:07:44,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 363 transitions, 4772 flow [2024-06-03 19:07:44,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:07:44,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:07:44,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-03 19:07:44,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-03 19:07:44,968 INFO L175 Difference]: Start difference. First operand has 284 places, 338 transitions, 3602 flow. Second operand 8 states and 149 transitions. [2024-06-03 19:07:44,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 363 transitions, 4772 flow [2024-06-03 19:07:45,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 363 transitions, 4624 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-03 19:07:45,871 INFO L231 Difference]: Finished difference. Result has 286 places, 344 transitions, 3754 flow [2024-06-03 19:07:45,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3454, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3754, PETRI_PLACES=286, PETRI_TRANSITIONS=344} [2024-06-03 19:07:45,871 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 242 predicate places. [2024-06-03 19:07:45,872 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 344 transitions, 3754 flow [2024-06-03 19:07:45,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:07:45,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:07:45,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:07:45,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-03 19:07:45,872 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:07:45,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:07:45,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1872452126, now seen corresponding path program 5 times [2024-06-03 19:07:45,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:07:45,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825822047] [2024-06-03 19:07:45,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:07:45,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:07:45,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:07:46,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:07:46,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:07:46,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825822047] [2024-06-03 19:07:46,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825822047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:07:46,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:07:46,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:07:46,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790342943] [2024-06-03 19:07:46,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:07:46,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:07:46,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:07:46,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:07:46,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:07:46,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:07:46,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 344 transitions, 3754 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:07:46,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:07:46,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:07:46,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:07:48,112 INFO L124 PetriNetUnfolderBase]: 3232/5312 cut-off events. [2024-06-03 19:07:48,112 INFO L125 PetriNetUnfolderBase]: For 672587/672589 co-relation queries the response was YES. [2024-06-03 19:07:48,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50959 conditions, 5312 events. 3232/5312 cut-off events. For 672587/672589 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 33197 event pairs, 743 based on Foata normal form. 3/5314 useless extension candidates. Maximal degree in co-relation 50824. Up to 4846 conditions per place. [2024-06-03 19:07:48,181 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 297 selfloop transitions, 68 changer transitions 0/370 dead transitions. [2024-06-03 19:07:48,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 370 transitions, 5230 flow [2024-06-03 19:07:48,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:07:48,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:07:48,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-03 19:07:48,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-03 19:07:48,183 INFO L175 Difference]: Start difference. First operand has 286 places, 344 transitions, 3754 flow. Second operand 8 states and 148 transitions. [2024-06-03 19:07:48,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 370 transitions, 5230 flow [2024-06-03 19:07:49,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 370 transitions, 5107 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-03 19:07:49,134 INFO L231 Difference]: Finished difference. Result has 290 places, 353 transitions, 4139 flow [2024-06-03 19:07:49,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3631, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4139, PETRI_PLACES=290, PETRI_TRANSITIONS=353} [2024-06-03 19:07:49,135 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 246 predicate places. [2024-06-03 19:07:49,135 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 353 transitions, 4139 flow [2024-06-03 19:07:49,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:07:49,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:07:49,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:07:49,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-03 19:07:49,136 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:07:49,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:07:49,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1872184813, now seen corresponding path program 2 times [2024-06-03 19:07:49,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:07:49,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252550353] [2024-06-03 19:07:49,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:07:49,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:07:49,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:07:50,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:07:50,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:07:50,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252550353] [2024-06-03 19:07:50,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252550353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:07:50,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:07:50,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:07:50,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042880329] [2024-06-03 19:07:50,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:07:50,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:07:50,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:07:50,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:07:50,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:07:50,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:07:50,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 353 transitions, 4139 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:07:50,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:07:50,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:07:50,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:07:51,638 INFO L124 PetriNetUnfolderBase]: 3245/5331 cut-off events. [2024-06-03 19:07:51,639 INFO L125 PetriNetUnfolderBase]: For 695168/695174 co-relation queries the response was YES. [2024-06-03 19:07:51,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51832 conditions, 5331 events. 3245/5331 cut-off events. For 695168/695174 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 33307 event pairs, 736 based on Foata normal form. 7/5337 useless extension candidates. Maximal degree in co-relation 51695. Up to 4958 conditions per place. [2024-06-03 19:07:51,709 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 332 selfloop transitions, 41 changer transitions 0/378 dead transitions. [2024-06-03 19:07:51,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 378 transitions, 5283 flow [2024-06-03 19:07:51,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:07:51,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:07:51,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-03 19:07:51,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-03 19:07:51,711 INFO L175 Difference]: Start difference. First operand has 290 places, 353 transitions, 4139 flow. Second operand 8 states and 145 transitions. [2024-06-03 19:07:51,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 378 transitions, 5283 flow [2024-06-03 19:07:52,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 378 transitions, 5109 flow, removed 69 selfloop flow, removed 3 redundant places. [2024-06-03 19:07:52,746 INFO L231 Difference]: Finished difference. Result has 296 places, 361 transitions, 4251 flow [2024-06-03 19:07:52,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3965, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4251, PETRI_PLACES=296, PETRI_TRANSITIONS=361} [2024-06-03 19:07:52,746 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 252 predicate places. [2024-06-03 19:07:52,747 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 361 transitions, 4251 flow [2024-06-03 19:07:52,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:07:52,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:07:52,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:07:52,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-03 19:07:52,747 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:07:52,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:07:52,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1872451723, now seen corresponding path program 3 times [2024-06-03 19:07:52,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:07:52,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495598774] [2024-06-03 19:07:52,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:07:52,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:07:52,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:07:53,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:07:53,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:07:53,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495598774] [2024-06-03 19:07:53,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495598774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:07:53,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:07:53,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:07:53,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315834248] [2024-06-03 19:07:53,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:07:53,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:07:53,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:07:53,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:07:53,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:07:53,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:07:53,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 361 transitions, 4251 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:07:53,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:07:53,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:07:53,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:07:55,166 INFO L124 PetriNetUnfolderBase]: 3250/5338 cut-off events. [2024-06-03 19:07:55,167 INFO L125 PetriNetUnfolderBase]: For 710349/710355 co-relation queries the response was YES. [2024-06-03 19:07:55,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52370 conditions, 5338 events. 3250/5338 cut-off events. For 710349/710355 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 33370 event pairs, 736 based on Foata normal form. 7/5344 useless extension candidates. Maximal degree in co-relation 52230. Up to 4977 conditions per place. [2024-06-03 19:07:55,240 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 341 selfloop transitions, 34 changer transitions 0/380 dead transitions. [2024-06-03 19:07:55,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 380 transitions, 5140 flow [2024-06-03 19:07:55,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:07:55,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:07:55,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-03 19:07:55,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-03 19:07:55,242 INFO L175 Difference]: Start difference. First operand has 296 places, 361 transitions, 4251 flow. Second operand 8 states and 143 transitions. [2024-06-03 19:07:55,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 380 transitions, 5140 flow [2024-06-03 19:07:56,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 380 transitions, 4990 flow, removed 56 selfloop flow, removed 4 redundant places. [2024-06-03 19:07:56,487 INFO L231 Difference]: Finished difference. Result has 300 places, 364 transitions, 4272 flow [2024-06-03 19:07:56,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4119, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4272, PETRI_PLACES=300, PETRI_TRANSITIONS=364} [2024-06-03 19:07:56,488 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 256 predicate places. [2024-06-03 19:07:56,488 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 364 transitions, 4272 flow [2024-06-03 19:07:56,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:07:56,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:07:56,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:07:56,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-03 19:07:56,489 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:07:56,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:07:56,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1872572096, now seen corresponding path program 6 times [2024-06-03 19:07:56,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:07:56,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701387271] [2024-06-03 19:07:56,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:07:56,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:07:56,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:07:57,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:07:57,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:07:57,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701387271] [2024-06-03 19:07:57,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701387271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:07:57,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:07:57,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:07:57,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058593033] [2024-06-03 19:07:57,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:07:57,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:07:57,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:07:57,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:07:57,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:07:57,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:07:57,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 364 transitions, 4272 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:07:57,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:07:57,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:07:57,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:07:58,805 INFO L124 PetriNetUnfolderBase]: 3247/5331 cut-off events. [2024-06-03 19:07:58,805 INFO L125 PetriNetUnfolderBase]: For 719579/719579 co-relation queries the response was YES. [2024-06-03 19:07:58,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52349 conditions, 5331 events. 3247/5331 cut-off events. For 719579/719579 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 33321 event pairs, 736 based on Foata normal form. 1/5331 useless extension candidates. Maximal degree in co-relation 52207. Up to 4973 conditions per place. [2024-06-03 19:07:58,872 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 343 selfloop transitions, 31 changer transitions 0/379 dead transitions. [2024-06-03 19:07:58,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 379 transitions, 5062 flow [2024-06-03 19:07:58,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:07:58,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:07:58,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-03 19:07:58,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-03 19:07:58,873 INFO L175 Difference]: Start difference. First operand has 300 places, 364 transitions, 4272 flow. Second operand 8 states and 142 transitions. [2024-06-03 19:07:58,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 379 transitions, 5062 flow [2024-06-03 19:08:00,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 379 transitions, 4850 flow, removed 74 selfloop flow, removed 6 redundant places. [2024-06-03 19:08:00,011 INFO L231 Difference]: Finished difference. Result has 302 places, 364 transitions, 4128 flow [2024-06-03 19:08:00,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4060, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4128, PETRI_PLACES=302, PETRI_TRANSITIONS=364} [2024-06-03 19:08:00,012 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 258 predicate places. [2024-06-03 19:08:00,012 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 364 transitions, 4128 flow [2024-06-03 19:08:00,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:08:00,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:08:00,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:08:00,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-03 19:08:00,013 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:08:00,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:08:00,013 INFO L85 PathProgramCache]: Analyzing trace with hash 2052759618, now seen corresponding path program 1 times [2024-06-03 19:08:00,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:08:00,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292034368] [2024-06-03 19:08:00,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:08:00,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:08:00,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:08:00,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:08:00,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:08:00,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292034368] [2024-06-03 19:08:00,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292034368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:08:00,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:08:00,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:08:00,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873036876] [2024-06-03 19:08:00,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:08:00,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:08:00,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:08:00,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:08:00,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:08:01,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:08:01,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 364 transitions, 4128 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:08:01,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:08:01,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:08:01,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:08:02,216 INFO L124 PetriNetUnfolderBase]: 3152/5208 cut-off events. [2024-06-03 19:08:02,217 INFO L125 PetriNetUnfolderBase]: For 737055/737070 co-relation queries the response was YES. [2024-06-03 19:08:02,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51759 conditions, 5208 events. 3152/5208 cut-off events. For 737055/737070 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 32872 event pairs, 579 based on Foata normal form. 15/5197 useless extension candidates. Maximal degree in co-relation 51616. Up to 4650 conditions per place. [2024-06-03 19:08:02,294 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 325 selfloop transitions, 26 changer transitions 0/392 dead transitions. [2024-06-03 19:08:02,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 392 transitions, 4982 flow [2024-06-03 19:08:02,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:08:02,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:08:02,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-03 19:08:02,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-03 19:08:02,295 INFO L175 Difference]: Start difference. First operand has 302 places, 364 transitions, 4128 flow. Second operand 8 states and 156 transitions. [2024-06-03 19:08:02,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 392 transitions, 4982 flow [2024-06-03 19:08:03,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 392 transitions, 4864 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-03 19:08:03,627 INFO L231 Difference]: Finished difference. Result has 302 places, 366 transitions, 4145 flow [2024-06-03 19:08:03,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4010, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4145, PETRI_PLACES=302, PETRI_TRANSITIONS=366} [2024-06-03 19:08:03,628 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 258 predicate places. [2024-06-03 19:08:03,628 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 366 transitions, 4145 flow [2024-06-03 19:08:03,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:08:03,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:08:03,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:08:03,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-03 19:08:03,629 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:08:03,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:08:03,629 INFO L85 PathProgramCache]: Analyzing trace with hash 2106905534, now seen corresponding path program 2 times [2024-06-03 19:08:03,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:08:03,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519989707] [2024-06-03 19:08:03,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:08:03,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:08:03,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:08:04,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:08:04,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:08:04,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519989707] [2024-06-03 19:08:04,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519989707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:08:04,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:08:04,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:08:04,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146536751] [2024-06-03 19:08:04,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:08:04,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:08:04,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:08:04,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:08:04,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:08:04,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:08:04,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 366 transitions, 4145 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:08:04,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:08:04,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:08:04,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:08:05,694 INFO L124 PetriNetUnfolderBase]: 3160/5220 cut-off events. [2024-06-03 19:08:05,694 INFO L125 PetriNetUnfolderBase]: For 752625/752640 co-relation queries the response was YES. [2024-06-03 19:08:05,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52181 conditions, 5220 events. 3160/5220 cut-off events. For 752625/752640 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 32998 event pairs, 706 based on Foata normal form. 15/5194 useless extension candidates. Maximal degree in co-relation 52039. Up to 4699 conditions per place. [2024-06-03 19:08:05,766 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 322 selfloop transitions, 27 changer transitions 0/390 dead transitions. [2024-06-03 19:08:05,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 390 transitions, 4987 flow [2024-06-03 19:08:05,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:08:05,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:08:05,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-03 19:08:05,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44476744186046513 [2024-06-03 19:08:05,768 INFO L175 Difference]: Start difference. First operand has 302 places, 366 transitions, 4145 flow. Second operand 8 states and 153 transitions. [2024-06-03 19:08:05,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 390 transitions, 4987 flow [2024-06-03 19:08:07,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 390 transitions, 4868 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-03 19:08:07,436 INFO L231 Difference]: Finished difference. Result has 304 places, 368 transitions, 4167 flow [2024-06-03 19:08:07,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4026, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4167, PETRI_PLACES=304, PETRI_TRANSITIONS=368} [2024-06-03 19:08:07,437 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 260 predicate places. [2024-06-03 19:08:07,437 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 368 transitions, 4167 flow [2024-06-03 19:08:07,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:08:07,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:08:07,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:08:07,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-03 19:08:07,438 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:08:07,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:08:07,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1917197788, now seen corresponding path program 3 times [2024-06-03 19:08:07,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:08:07,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789223821] [2024-06-03 19:08:07,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:08:07,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:08:07,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:08:08,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:08:08,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:08:08,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789223821] [2024-06-03 19:08:08,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789223821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:08:08,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:08:08,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:08:08,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260901391] [2024-06-03 19:08:08,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:08:08,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:08:08,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:08:08,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:08:08,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:08:08,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:08:08,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 368 transitions, 4167 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:08:08,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:08:08,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:08:08,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:08:09,709 INFO L124 PetriNetUnfolderBase]: 3168/5230 cut-off events. [2024-06-03 19:08:09,709 INFO L125 PetriNetUnfolderBase]: For 770734/770745 co-relation queries the response was YES. [2024-06-03 19:08:09,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52513 conditions, 5230 events. 3168/5230 cut-off events. For 770734/770745 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 33051 event pairs, 710 based on Foata normal form. 11/5200 useless extension candidates. Maximal degree in co-relation 52370. Up to 4703 conditions per place. [2024-06-03 19:08:09,783 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 315 selfloop transitions, 30 changer transitions 0/386 dead transitions. [2024-06-03 19:08:09,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 386 transitions, 4983 flow [2024-06-03 19:08:09,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:08:09,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:08:09,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-03 19:08:09,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-03 19:08:09,785 INFO L175 Difference]: Start difference. First operand has 304 places, 368 transitions, 4167 flow. Second operand 8 states and 149 transitions. [2024-06-03 19:08:09,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 386 transitions, 4983 flow [2024-06-03 19:08:11,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 386 transitions, 4853 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-03 19:08:11,087 INFO L231 Difference]: Finished difference. Result has 306 places, 370 transitions, 4188 flow [2024-06-03 19:08:11,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4037, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4188, PETRI_PLACES=306, PETRI_TRANSITIONS=370} [2024-06-03 19:08:11,088 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 262 predicate places. [2024-06-03 19:08:11,088 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 370 transitions, 4188 flow [2024-06-03 19:08:11,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:08:11,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:08:11,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:08:11,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-03 19:08:11,089 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:08:11,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:08:11,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1916797609, now seen corresponding path program 1 times [2024-06-03 19:08:11,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:08:11,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960580698] [2024-06-03 19:08:11,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:08:11,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:08:11,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:08:12,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:08:12,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:08:12,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960580698] [2024-06-03 19:08:12,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960580698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:08:12,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:08:12,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:08:12,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321830201] [2024-06-03 19:08:12,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:08:12,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:08:12,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:08:12,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:08:12,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:08:12,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-03 19:08:12,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 370 transitions, 4188 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:08:12,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:08:12,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-03 19:08:12,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:08:13,987 INFO L124 PetriNetUnfolderBase]: 2990/4995 cut-off events. [2024-06-03 19:08:13,988 INFO L125 PetriNetUnfolderBase]: For 781499/781552 co-relation queries the response was YES. [2024-06-03 19:08:14,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51302 conditions, 4995 events. 2990/4995 cut-off events. For 781499/781552 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 32007 event pairs, 676 based on Foata normal form. 23/4939 useless extension candidates. Maximal degree in co-relation 51158. Up to 4322 conditions per place. [2024-06-03 19:08:14,059 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 276 selfloop transitions, 37 changer transitions 0/388 dead transitions. [2024-06-03 19:08:14,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 388 transitions, 4946 flow [2024-06-03 19:08:14,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:08:14,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:08:14,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-03 19:08:14,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-03 19:08:14,061 INFO L175 Difference]: Start difference. First operand has 306 places, 370 transitions, 4188 flow. Second operand 8 states and 155 transitions. [2024-06-03 19:08:14,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 388 transitions, 4946 flow [2024-06-03 19:08:15,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 388 transitions, 4811 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-03 19:08:15,216 INFO L231 Difference]: Finished difference. Result has 308 places, 373 transitions, 4232 flow [2024-06-03 19:08:15,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4053, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4232, PETRI_PLACES=308, PETRI_TRANSITIONS=373} [2024-06-03 19:08:15,217 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 264 predicate places. [2024-06-03 19:08:15,217 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 373 transitions, 4232 flow [2024-06-03 19:08:15,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:08:15,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:08:15,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:08:15,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-03 19:08:15,218 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:08:15,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:08:15,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1951982582, now seen corresponding path program 4 times [2024-06-03 19:08:15,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:08:15,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318117591] [2024-06-03 19:08:15,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:08:15,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:08:15,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:08:16,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:08:16,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:08:16,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318117591] [2024-06-03 19:08:16,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318117591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:08:16,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:08:16,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:08:16,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946705478] [2024-06-03 19:08:16,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:08:16,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:08:16,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:08:16,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:08:16,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:08:16,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:08:16,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 373 transitions, 4232 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:08:16,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:08:16,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:08:16,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:08:17,432 INFO L124 PetriNetUnfolderBase]: 3291/5401 cut-off events. [2024-06-03 19:08:17,432 INFO L125 PetriNetUnfolderBase]: For 802103/802109 co-relation queries the response was YES. [2024-06-03 19:08:17,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54233 conditions, 5401 events. 3291/5401 cut-off events. For 802103/802109 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 33812 event pairs, 736 based on Foata normal form. 8/5408 useless extension candidates. Maximal degree in co-relation 54088. Up to 5012 conditions per place. [2024-06-03 19:08:17,502 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 358 selfloop transitions, 34 changer transitions 0/397 dead transitions. [2024-06-03 19:08:17,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 397 transitions, 5196 flow [2024-06-03 19:08:17,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:08:17,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:08:17,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-03 19:08:17,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-03 19:08:17,503 INFO L175 Difference]: Start difference. First operand has 308 places, 373 transitions, 4232 flow. Second operand 8 states and 147 transitions. [2024-06-03 19:08:17,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 397 transitions, 5196 flow [2024-06-03 19:08:18,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 397 transitions, 5049 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-03 19:08:18,830 INFO L231 Difference]: Finished difference. Result has 310 places, 376 transitions, 4259 flow [2024-06-03 19:08:18,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4085, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4259, PETRI_PLACES=310, PETRI_TRANSITIONS=376} [2024-06-03 19:08:18,831 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 266 predicate places. [2024-06-03 19:08:18,831 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 376 transitions, 4259 flow [2024-06-03 19:08:18,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:08:18,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:08:18,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:08:18,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-03 19:08:18,832 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:08:18,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:08:18,832 INFO L85 PathProgramCache]: Analyzing trace with hash 880692376, now seen corresponding path program 5 times [2024-06-03 19:08:18,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:08:18,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673187151] [2024-06-03 19:08:18,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:08:18,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:08:18,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:08:19,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:08:19,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:08:19,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673187151] [2024-06-03 19:08:19,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673187151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:08:19,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:08:19,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:08:19,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43149964] [2024-06-03 19:08:19,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:08:19,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:08:19,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:08:19,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:08:19,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:08:19,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:08:19,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 376 transitions, 4259 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:08:19,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:08:19,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:08:19,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:08:20,950 INFO L124 PetriNetUnfolderBase]: 3317/5439 cut-off events. [2024-06-03 19:08:20,951 INFO L125 PetriNetUnfolderBase]: For 828794/828800 co-relation queries the response was YES. [2024-06-03 19:08:21,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55052 conditions, 5439 events. 3317/5439 cut-off events. For 828794/828800 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 34024 event pairs, 737 based on Foata normal form. 8/5446 useless extension candidates. Maximal degree in co-relation 54906. Up to 5019 conditions per place. [2024-06-03 19:08:21,040 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 352 selfloop transitions, 45 changer transitions 0/402 dead transitions. [2024-06-03 19:08:21,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 402 transitions, 5553 flow [2024-06-03 19:08:21,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:08:21,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:08:21,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-03 19:08:21,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-03 19:08:21,042 INFO L175 Difference]: Start difference. First operand has 310 places, 376 transitions, 4259 flow. Second operand 8 states and 147 transitions. [2024-06-03 19:08:21,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 402 transitions, 5553 flow [2024-06-03 19:08:22,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 402 transitions, 5378 flow, removed 37 selfloop flow, removed 8 redundant places. [2024-06-03 19:08:22,639 INFO L231 Difference]: Finished difference. Result has 311 places, 382 transitions, 4418 flow [2024-06-03 19:08:22,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4084, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4418, PETRI_PLACES=311, PETRI_TRANSITIONS=382} [2024-06-03 19:08:22,640 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 267 predicate places. [2024-06-03 19:08:22,640 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 382 transitions, 4418 flow [2024-06-03 19:08:22,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:08:22,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:08:22,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:08:22,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-03 19:08:22,641 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:08:22,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:08:22,641 INFO L85 PathProgramCache]: Analyzing trace with hash 640232320, now seen corresponding path program 7 times [2024-06-03 19:08:22,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:08:22,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292897304] [2024-06-03 19:08:22,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:08:22,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:08:22,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:08:23,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:08:23,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:08:23,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292897304] [2024-06-03 19:08:23,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292897304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:08:23,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:08:23,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:08:23,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002616236] [2024-06-03 19:08:23,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:08:23,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:08:23,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:08:23,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:08:23,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:08:23,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:08:23,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 382 transitions, 4418 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:08:23,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:08:23,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:08:23,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:08:24,786 INFO L124 PetriNetUnfolderBase]: 3322/5446 cut-off events. [2024-06-03 19:08:24,787 INFO L125 PetriNetUnfolderBase]: For 843760/843760 co-relation queries the response was YES. [2024-06-03 19:08:24,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55722 conditions, 5446 events. 3322/5446 cut-off events. For 843760/843760 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 34078 event pairs, 748 based on Foata normal form. 1/5446 useless extension candidates. Maximal degree in co-relation 55574. Up to 5022 conditions per place. [2024-06-03 19:08:24,869 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 359 selfloop transitions, 40 changer transitions 0/404 dead transitions. [2024-06-03 19:08:24,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 404 transitions, 5386 flow [2024-06-03 19:08:24,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:08:24,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:08:24,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-03 19:08:24,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-03 19:08:24,870 INFO L175 Difference]: Start difference. First operand has 311 places, 382 transitions, 4418 flow. Second operand 8 states and 147 transitions. [2024-06-03 19:08:24,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 404 transitions, 5386 flow [2024-06-03 19:08:26,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 404 transitions, 5216 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-03 19:08:26,292 INFO L231 Difference]: Finished difference. Result has 314 places, 385 transitions, 4454 flow [2024-06-03 19:08:26,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4248, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4454, PETRI_PLACES=314, PETRI_TRANSITIONS=385} [2024-06-03 19:08:26,292 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 270 predicate places. [2024-06-03 19:08:26,292 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 385 transitions, 4454 flow [2024-06-03 19:08:26,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:08:26,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:08:26,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:08:26,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-03 19:08:26,293 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:08:26,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:08:26,293 INFO L85 PathProgramCache]: Analyzing trace with hash -783404604, now seen corresponding path program 6 times [2024-06-03 19:08:26,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:08:26,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329088417] [2024-06-03 19:08:26,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:08:26,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:08:26,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:08:27,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:08:27,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:08:27,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329088417] [2024-06-03 19:08:27,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329088417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:08:27,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:08:27,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:08:27,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616682616] [2024-06-03 19:08:27,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:08:27,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:08:27,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:08:27,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:08:27,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:08:27,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:08:27,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 385 transitions, 4454 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:08:27,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:08:27,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:08:27,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:08:28,429 INFO L124 PetriNetUnfolderBase]: 3316/5440 cut-off events. [2024-06-03 19:08:28,429 INFO L125 PetriNetUnfolderBase]: For 853022/853028 co-relation queries the response was YES. [2024-06-03 19:08:28,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55421 conditions, 5440 events. 3316/5440 cut-off events. For 853022/853028 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 34057 event pairs, 738 based on Foata normal form. 8/5447 useless extension candidates. Maximal degree in co-relation 55272. Up to 5047 conditions per place. [2024-06-03 19:08:28,502 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 368 selfloop transitions, 33 changer transitions 0/406 dead transitions. [2024-06-03 19:08:28,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 406 transitions, 5342 flow [2024-06-03 19:08:28,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:08:28,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:08:28,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-03 19:08:28,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-03 19:08:28,503 INFO L175 Difference]: Start difference. First operand has 314 places, 385 transitions, 4454 flow. Second operand 8 states and 148 transitions. [2024-06-03 19:08:28,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 406 transitions, 5342 flow [2024-06-03 19:08:30,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 406 transitions, 5104 flow, removed 81 selfloop flow, removed 6 redundant places. [2024-06-03 19:08:30,245 INFO L231 Difference]: Finished difference. Result has 316 places, 385 transitions, 4288 flow [2024-06-03 19:08:30,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4216, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4288, PETRI_PLACES=316, PETRI_TRANSITIONS=385} [2024-06-03 19:08:30,260 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 272 predicate places. [2024-06-03 19:08:30,260 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 385 transitions, 4288 flow [2024-06-03 19:08:30,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:08:30,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:08:30,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:08:30,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-03 19:08:30,261 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:08:30,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:08:30,261 INFO L85 PathProgramCache]: Analyzing trace with hash -783255060, now seen corresponding path program 8 times [2024-06-03 19:08:30,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:08:30,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81181009] [2024-06-03 19:08:30,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:08:30,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:08:30,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:08:31,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:08:31,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:08:31,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81181009] [2024-06-03 19:08:31,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81181009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:08:31,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:08:31,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:08:31,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687738318] [2024-06-03 19:08:31,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:08:31,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:08:31,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:08:31,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:08:31,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:08:31,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:08:31,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 385 transitions, 4288 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:08:31,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:08:31,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:08:31,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:08:32,505 INFO L124 PetriNetUnfolderBase]: 3313/5434 cut-off events. [2024-06-03 19:08:32,505 INFO L125 PetriNetUnfolderBase]: For 857582/857582 co-relation queries the response was YES. [2024-06-03 19:08:32,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55198 conditions, 5434 events. 3313/5434 cut-off events. For 857582/857582 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 34017 event pairs, 747 based on Foata normal form. 1/5434 useless extension candidates. Maximal degree in co-relation 55048. Up to 5004 conditions per place. [2024-06-03 19:08:32,584 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 351 selfloop transitions, 45 changer transitions 0/401 dead transitions. [2024-06-03 19:08:32,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 401 transitions, 5126 flow [2024-06-03 19:08:32,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:08:32,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:08:32,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-03 19:08:32,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-03 19:08:32,585 INFO L175 Difference]: Start difference. First operand has 316 places, 385 transitions, 4288 flow. Second operand 8 states and 146 transitions. [2024-06-03 19:08:32,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 401 transitions, 5126 flow [2024-06-03 19:08:34,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 401 transitions, 4962 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-03 19:08:34,362 INFO L231 Difference]: Finished difference. Result has 317 places, 385 transitions, 4220 flow [2024-06-03 19:08:34,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4124, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4220, PETRI_PLACES=317, PETRI_TRANSITIONS=385} [2024-06-03 19:08:34,363 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 273 predicate places. [2024-06-03 19:08:34,363 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 385 transitions, 4220 flow [2024-06-03 19:08:34,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:08:34,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:08:34,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:08:34,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-03 19:08:34,364 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:08:34,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:08:34,364 INFO L85 PathProgramCache]: Analyzing trace with hash -783254874, now seen corresponding path program 7 times [2024-06-03 19:08:34,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:08:34,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409932766] [2024-06-03 19:08:34,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:08:34,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:08:34,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:08:35,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:08:35,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:08:35,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409932766] [2024-06-03 19:08:35,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409932766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:08:35,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:08:35,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:08:35,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19963657] [2024-06-03 19:08:35,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:08:35,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:08:35,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:08:35,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:08:35,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:08:35,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:08:35,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 385 transitions, 4220 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:08:35,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:08:35,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:08:35,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:08:36,509 INFO L124 PetriNetUnfolderBase]: 3307/5428 cut-off events. [2024-06-03 19:08:36,510 INFO L125 PetriNetUnfolderBase]: For 867272/867278 co-relation queries the response was YES. [2024-06-03 19:08:36,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54997 conditions, 5428 events. 3307/5428 cut-off events. For 867272/867278 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 33966 event pairs, 737 based on Foata normal form. 8/5435 useless extension candidates. Maximal degree in co-relation 54846. Up to 5020 conditions per place. [2024-06-03 19:08:36,591 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 358 selfloop transitions, 41 changer transitions 0/404 dead transitions. [2024-06-03 19:08:36,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 404 transitions, 5118 flow [2024-06-03 19:08:36,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:08:36,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:08:36,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-03 19:08:36,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-03 19:08:36,592 INFO L175 Difference]: Start difference. First operand has 317 places, 385 transitions, 4220 flow. Second operand 8 states and 147 transitions. [2024-06-03 19:08:36,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 404 transitions, 5118 flow [2024-06-03 19:08:38,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 404 transitions, 4904 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-03 19:08:38,495 INFO L231 Difference]: Finished difference. Result has 318 places, 385 transitions, 4094 flow [2024-06-03 19:08:38,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4006, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4094, PETRI_PLACES=318, PETRI_TRANSITIONS=385} [2024-06-03 19:08:38,495 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 274 predicate places. [2024-06-03 19:08:38,495 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 385 transitions, 4094 flow [2024-06-03 19:08:38,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:08:38,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:08:38,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:08:38,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-03 19:08:38,496 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:08:38,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:08:38,496 INFO L85 PathProgramCache]: Analyzing trace with hash 640561013, now seen corresponding path program 4 times [2024-06-03 19:08:38,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:08:38,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207293360] [2024-06-03 19:08:38,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:08:38,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:08:38,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:08:39,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:08:39,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:08:39,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207293360] [2024-06-03 19:08:39,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207293360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:08:39,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:08:39,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:08:39,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628269289] [2024-06-03 19:08:39,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:08:39,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:08:39,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:08:39,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:08:39,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:08:39,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:08:39,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 385 transitions, 4094 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:08:39,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:08:39,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:08:39,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:08:41,003 INFO L124 PetriNetUnfolderBase]: 3304/5424 cut-off events. [2024-06-03 19:08:41,004 INFO L125 PetriNetUnfolderBase]: For 872138/872144 co-relation queries the response was YES. [2024-06-03 19:08:41,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54862 conditions, 5424 events. 3304/5424 cut-off events. For 872138/872144 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 34035 event pairs, 737 based on Foata normal form. 7/5430 useless extension candidates. Maximal degree in co-relation 54710. Up to 5067 conditions per place. [2024-06-03 19:08:41,088 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 372 selfloop transitions, 26 changer transitions 0/403 dead transitions. [2024-06-03 19:08:41,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 403 transitions, 4969 flow [2024-06-03 19:08:41,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:08:41,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:08:41,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-03 19:08:41,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-03 19:08:41,089 INFO L175 Difference]: Start difference. First operand has 318 places, 385 transitions, 4094 flow. Second operand 8 states and 142 transitions. [2024-06-03 19:08:41,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 403 transitions, 4969 flow [2024-06-03 19:08:42,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 403 transitions, 4746 flow, removed 50 selfloop flow, removed 8 redundant places. [2024-06-03 19:08:42,885 INFO L231 Difference]: Finished difference. Result has 318 places, 386 transitions, 3958 flow [2024-06-03 19:08:42,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3889, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3958, PETRI_PLACES=318, PETRI_TRANSITIONS=386} [2024-06-03 19:08:42,886 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 274 predicate places. [2024-06-03 19:08:42,886 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 386 transitions, 3958 flow [2024-06-03 19:08:42,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:08:42,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:08:42,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:08:42,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-03 19:08:42,886 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:08:42,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:08:42,887 INFO L85 PathProgramCache]: Analyzing trace with hash -399024227, now seen corresponding path program 5 times [2024-06-03 19:08:42,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:08:42,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20299683] [2024-06-03 19:08:42,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:08:42,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:08:42,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:08:44,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:08:44,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:08:44,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20299683] [2024-06-03 19:08:44,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20299683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:08:44,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:08:44,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:08:44,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796617647] [2024-06-03 19:08:44,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:08:44,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:08:44,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:08:44,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:08:44,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:08:44,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:08:44,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 386 transitions, 3958 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:08:44,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:08:44,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:08:44,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:08:45,234 INFO L124 PetriNetUnfolderBase]: 3317/5442 cut-off events. [2024-06-03 19:08:45,234 INFO L125 PetriNetUnfolderBase]: For 892879/892885 co-relation queries the response was YES. [2024-06-03 19:08:45,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55143 conditions, 5442 events. 3317/5442 cut-off events. For 892879/892885 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 34076 event pairs, 735 based on Foata normal form. 7/5448 useless extension candidates. Maximal degree in co-relation 54991. Up to 5063 conditions per place. [2024-06-03 19:08:45,323 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 360 selfloop transitions, 44 changer transitions 0/409 dead transitions. [2024-06-03 19:08:45,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 409 transitions, 5212 flow [2024-06-03 19:08:45,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:08:45,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:08:45,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-03 19:08:45,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-03 19:08:45,326 INFO L175 Difference]: Start difference. First operand has 318 places, 386 transitions, 3958 flow. Second operand 8 states and 142 transitions. [2024-06-03 19:08:45,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 409 transitions, 5212 flow [2024-06-03 19:08:47,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 409 transitions, 5148 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-03 19:08:47,257 INFO L231 Difference]: Finished difference. Result has 321 places, 394 transitions, 4215 flow [2024-06-03 19:08:47,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3894, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4215, PETRI_PLACES=321, PETRI_TRANSITIONS=394} [2024-06-03 19:08:47,257 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 277 predicate places. [2024-06-03 19:08:47,258 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 394 transitions, 4215 flow [2024-06-03 19:08:47,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:08:47,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:08:47,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:08:47,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-03 19:08:47,258 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:08:47,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:08:47,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1024345973, now seen corresponding path program 6 times [2024-06-03 19:08:47,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:08:47,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314033696] [2024-06-03 19:08:47,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:08:47,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:08:47,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:08:48,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:08:48,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:08:48,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314033696] [2024-06-03 19:08:48,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314033696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:08:48,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:08:48,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:08:48,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015738953] [2024-06-03 19:08:48,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:08:48,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:08:48,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:08:48,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:08:48,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:08:48,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:08:48,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 394 transitions, 4215 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:08:48,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:08:48,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:08:48,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:08:49,559 INFO L124 PetriNetUnfolderBase]: 3314/5438 cut-off events. [2024-06-03 19:08:49,559 INFO L125 PetriNetUnfolderBase]: For 906389/906395 co-relation queries the response was YES. [2024-06-03 19:08:49,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55497 conditions, 5438 events. 3314/5438 cut-off events. For 906389/906395 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 34070 event pairs, 735 based on Foata normal form. 7/5444 useless extension candidates. Maximal degree in co-relation 55343. Up to 5072 conditions per place. [2024-06-03 19:08:49,635 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 370 selfloop transitions, 34 changer transitions 0/409 dead transitions. [2024-06-03 19:08:49,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 409 transitions, 5080 flow [2024-06-03 19:08:49,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:08:49,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:08:49,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-03 19:08:49,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-03 19:08:49,636 INFO L175 Difference]: Start difference. First operand has 321 places, 394 transitions, 4215 flow. Second operand 8 states and 140 transitions. [2024-06-03 19:08:49,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 409 transitions, 5080 flow [2024-06-03 19:08:51,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 409 transitions, 4885 flow, removed 79 selfloop flow, removed 4 redundant places. [2024-06-03 19:08:51,634 INFO L231 Difference]: Finished difference. Result has 325 places, 395 transitions, 4111 flow [2024-06-03 19:08:51,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4026, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4111, PETRI_PLACES=325, PETRI_TRANSITIONS=395} [2024-06-03 19:08:51,634 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 281 predicate places. [2024-06-03 19:08:51,634 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 395 transitions, 4111 flow [2024-06-03 19:08:51,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:08:51,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:08:51,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:08:51,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-03 19:08:51,635 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:08:51,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:08:51,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1024582906, now seen corresponding path program 8 times [2024-06-03 19:08:51,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:08:51,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567620714] [2024-06-03 19:08:51,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:08:51,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:08:51,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:08:52,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:08:52,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:08:52,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567620714] [2024-06-03 19:08:52,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567620714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:08:52,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:08:52,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:08:52,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723224303] [2024-06-03 19:08:52,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:08:52,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:08:52,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:08:52,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:08:52,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:08:52,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:08:52,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 395 transitions, 4111 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:08:52,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:08:52,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:08:52,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:08:53,837 INFO L124 PetriNetUnfolderBase]: 3340/5476 cut-off events. [2024-06-03 19:08:53,837 INFO L125 PetriNetUnfolderBase]: For 939838/939844 co-relation queries the response was YES. [2024-06-03 19:08:53,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56399 conditions, 5476 events. 3340/5476 cut-off events. For 939838/939844 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 34341 event pairs, 736 based on Foata normal form. 8/5483 useless extension candidates. Maximal degree in co-relation 56243. Up to 5008 conditions per place. [2024-06-03 19:08:54,052 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 347 selfloop transitions, 67 changer transitions 0/419 dead transitions. [2024-06-03 19:08:54,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 419 transitions, 5495 flow [2024-06-03 19:08:54,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:08:54,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:08:54,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-03 19:08:54,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-03 19:08:54,053 INFO L175 Difference]: Start difference. First operand has 325 places, 395 transitions, 4111 flow. Second operand 8 states and 147 transitions. [2024-06-03 19:08:54,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 419 transitions, 5495 flow [2024-06-03 19:08:55,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 419 transitions, 5415 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-03 19:08:55,956 INFO L231 Difference]: Finished difference. Result has 327 places, 401 transitions, 4413 flow [2024-06-03 19:08:55,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4031, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4413, PETRI_PLACES=327, PETRI_TRANSITIONS=401} [2024-06-03 19:08:55,957 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 283 predicate places. [2024-06-03 19:08:55,957 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 401 transitions, 4413 flow [2024-06-03 19:08:55,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:08:55,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:08:55,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:08:55,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-03 19:08:55,957 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:08:55,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:08:55,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1024345570, now seen corresponding path program 9 times [2024-06-03 19:08:55,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:08:55,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913724937] [2024-06-03 19:08:55,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:08:55,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:08:55,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:08:56,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:08:56,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:08:56,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913724937] [2024-06-03 19:08:56,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913724937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:08:56,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:08:56,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:08:56,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739232111] [2024-06-03 19:08:56,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:08:56,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:08:56,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:08:56,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:08:56,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:08:57,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:08:57,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 401 transitions, 4413 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:08:57,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:08:57,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:08:57,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:08:58,235 INFO L124 PetriNetUnfolderBase]: 3345/5483 cut-off events. [2024-06-03 19:08:58,235 INFO L125 PetriNetUnfolderBase]: For 958968/958968 co-relation queries the response was YES. [2024-06-03 19:08:58,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57267 conditions, 5483 events. 3345/5483 cut-off events. For 958968/958968 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 34346 event pairs, 747 based on Foata normal form. 1/5483 useless extension candidates. Maximal degree in co-relation 57110. Up to 5026 conditions per place. [2024-06-03 19:08:58,319 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 349 selfloop transitions, 63 changer transitions 0/417 dead transitions. [2024-06-03 19:08:58,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 417 transitions, 5415 flow [2024-06-03 19:08:58,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:08:58,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:08:58,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-03 19:08:58,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-03 19:08:58,321 INFO L175 Difference]: Start difference. First operand has 327 places, 401 transitions, 4413 flow. Second operand 8 states and 143 transitions. [2024-06-03 19:08:58,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 417 transitions, 5415 flow [2024-06-03 19:09:00,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 417 transitions, 5232 flow, removed 60 selfloop flow, removed 4 redundant places. [2024-06-03 19:09:00,392 INFO L231 Difference]: Finished difference. Result has 331 places, 404 transitions, 4510 flow [2024-06-03 19:09:00,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4230, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4510, PETRI_PLACES=331, PETRI_TRANSITIONS=404} [2024-06-03 19:09:00,393 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 287 predicate places. [2024-06-03 19:09:00,393 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 404 transitions, 4510 flow [2024-06-03 19:09:00,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:09:00,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:09:00,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:09:00,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-03 19:09:00,394 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:09:00,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:09:00,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1024345756, now seen corresponding path program 9 times [2024-06-03 19:09:00,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:09:00,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011371724] [2024-06-03 19:09:00,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:09:00,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:09:00,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:09:01,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:09:01,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:09:01,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011371724] [2024-06-03 19:09:01,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011371724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:09:01,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:09:01,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:09:01,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666364739] [2024-06-03 19:09:01,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:09:01,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:09:01,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:09:01,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:09:01,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:09:01,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:09:01,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 404 transitions, 4510 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:09:01,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:09:01,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:09:01,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:09:02,563 INFO L124 PetriNetUnfolderBase]: 3339/5477 cut-off events. [2024-06-03 19:09:02,563 INFO L125 PetriNetUnfolderBase]: For 972010/972016 co-relation queries the response was YES. [2024-06-03 19:09:02,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57417 conditions, 5477 events. 3339/5477 cut-off events. For 972010/972016 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 34319 event pairs, 733 based on Foata normal form. 8/5484 useless extension candidates. Maximal degree in co-relation 57258. Up to 5010 conditions per place. [2024-06-03 19:09:02,642 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 350 selfloop transitions, 66 changer transitions 0/421 dead transitions. [2024-06-03 19:09:02,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 421 transitions, 5456 flow [2024-06-03 19:09:02,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:09:02,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:09:02,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-03 19:09:02,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-03 19:09:02,644 INFO L175 Difference]: Start difference. First operand has 331 places, 404 transitions, 4510 flow. Second operand 8 states and 146 transitions. [2024-06-03 19:09:02,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 421 transitions, 5456 flow [2024-06-03 19:09:04,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 421 transitions, 5126 flow, removed 104 selfloop flow, removed 6 redundant places. [2024-06-03 19:09:04,646 INFO L231 Difference]: Finished difference. Result has 333 places, 404 transitions, 4318 flow [2024-06-03 19:09:04,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4180, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4318, PETRI_PLACES=333, PETRI_TRANSITIONS=404} [2024-06-03 19:09:04,647 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 289 predicate places. [2024-06-03 19:09:04,647 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 404 transitions, 4318 flow [2024-06-03 19:09:04,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:09:04,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:09:04,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:09:04,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-03 19:09:04,648 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:09:04,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:09:04,648 INFO L85 PathProgramCache]: Analyzing trace with hash 630670903, now seen corresponding path program 7 times [2024-06-03 19:09:04,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:09:04,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604640716] [2024-06-03 19:09:04,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:09:04,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:09:04,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:09:05,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:09:05,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:09:05,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604640716] [2024-06-03 19:09:05,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604640716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:09:05,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:09:05,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:09:05,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952571864] [2024-06-03 19:09:05,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:09:05,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:09:05,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:09:05,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:09:05,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:09:05,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:09:05,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 404 transitions, 4318 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:09:05,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:09:05,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:09:05,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:09:07,212 INFO L124 PetriNetUnfolderBase]: 3352/5498 cut-off events. [2024-06-03 19:09:07,212 INFO L125 PetriNetUnfolderBase]: For 988059/988067 co-relation queries the response was YES. [2024-06-03 19:09:07,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57730 conditions, 5498 events. 3352/5498 cut-off events. For 988059/988067 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 34569 event pairs, 747 based on Foata normal form. 9/5506 useless extension candidates. Maximal degree in co-relation 57570. Up to 5090 conditions per place. [2024-06-03 19:09:07,296 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 362 selfloop transitions, 57 changer transitions 0/424 dead transitions. [2024-06-03 19:09:07,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 424 transitions, 5622 flow [2024-06-03 19:09:07,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:09:07,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:09:07,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-03 19:09:07,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-03 19:09:07,298 INFO L175 Difference]: Start difference. First operand has 333 places, 404 transitions, 4318 flow. Second operand 8 states and 141 transitions. [2024-06-03 19:09:07,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 424 transitions, 5622 flow [2024-06-03 19:09:09,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 424 transitions, 5462 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-03 19:09:09,542 INFO L231 Difference]: Finished difference. Result has 335 places, 412 transitions, 4522 flow [2024-06-03 19:09:09,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4158, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4522, PETRI_PLACES=335, PETRI_TRANSITIONS=412} [2024-06-03 19:09:09,543 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 291 predicate places. [2024-06-03 19:09:09,543 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 412 transitions, 4522 flow [2024-06-03 19:09:09,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:09:09,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:09:09,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:09:09,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-03 19:09:09,544 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:09:09,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:09:09,544 INFO L85 PathProgramCache]: Analyzing trace with hash 630231726, now seen corresponding path program 10 times [2024-06-03 19:09:09,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:09:09,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124442146] [2024-06-03 19:09:09,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:09:09,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:09:09,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:09:10,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:09:10,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:09:10,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124442146] [2024-06-03 19:09:10,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124442146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:09:10,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:09:10,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:09:10,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884389379] [2024-06-03 19:09:10,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:09:10,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:09:10,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:09:10,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:09:10,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:09:10,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:09:10,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 412 transitions, 4522 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:09:10,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:09:10,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:09:10,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:09:11,902 INFO L124 PetriNetUnfolderBase]: 3370/5526 cut-off events. [2024-06-03 19:09:11,903 INFO L125 PetriNetUnfolderBase]: For 1021791/1021799 co-relation queries the response was YES. [2024-06-03 19:09:11,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58677 conditions, 5526 events. 3370/5526 cut-off events. For 1021791/1021799 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 34709 event pairs, 764 based on Foata normal form. 10/5535 useless extension candidates. Maximal degree in co-relation 58515. Up to 4999 conditions per place. [2024-06-03 19:09:11,983 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 338 selfloop transitions, 90 changer transitions 0/433 dead transitions. [2024-06-03 19:09:11,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 433 transitions, 5952 flow [2024-06-03 19:09:11,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:09:11,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:09:11,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-03 19:09:11,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-03 19:09:11,985 INFO L175 Difference]: Start difference. First operand has 335 places, 412 transitions, 4522 flow. Second operand 8 states and 146 transitions. [2024-06-03 19:09:11,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 433 transitions, 5952 flow [2024-06-03 19:09:14,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 433 transitions, 5776 flow, removed 60 selfloop flow, removed 4 redundant places. [2024-06-03 19:09:14,159 INFO L231 Difference]: Finished difference. Result has 339 places, 418 transitions, 4794 flow [2024-06-03 19:09:14,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4346, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4794, PETRI_PLACES=339, PETRI_TRANSITIONS=418} [2024-06-03 19:09:14,159 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 295 predicate places. [2024-06-03 19:09:14,160 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 418 transitions, 4794 flow [2024-06-03 19:09:14,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:09:14,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:09:14,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:09:14,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-03 19:09:14,160 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:09:14,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:09:14,160 INFO L85 PathProgramCache]: Analyzing trace with hash 630225216, now seen corresponding path program 11 times [2024-06-03 19:09:14,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:09:14,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311257252] [2024-06-03 19:09:14,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:09:14,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:09:14,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:09:15,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:09:15,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:09:15,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311257252] [2024-06-03 19:09:15,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311257252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:09:15,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:09:15,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:09:15,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069710146] [2024-06-03 19:09:15,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:09:15,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:09:15,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:09:15,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:09:15,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:09:15,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:09:15,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 418 transitions, 4794 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:09:15,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:09:15,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:09:15,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:09:16,557 INFO L124 PetriNetUnfolderBase]: 3380/5542 cut-off events. [2024-06-03 19:09:16,557 INFO L125 PetriNetUnfolderBase]: For 1045483/1045491 co-relation queries the response was YES. [2024-06-03 19:09:16,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59668 conditions, 5542 events. 3380/5542 cut-off events. For 1045483/1045491 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 34927 event pairs, 762 based on Foata normal form. 10/5551 useless extension candidates. Maximal degree in co-relation 59504. Up to 5009 conditions per place. [2024-06-03 19:09:16,631 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 341 selfloop transitions, 91 changer transitions 0/437 dead transitions. [2024-06-03 19:09:16,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 437 transitions, 6136 flow [2024-06-03 19:09:16,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:09:16,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:09:16,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-03 19:09:16,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-03 19:09:16,633 INFO L175 Difference]: Start difference. First operand has 339 places, 418 transitions, 4794 flow. Second operand 8 states and 148 transitions. [2024-06-03 19:09:16,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 437 transitions, 6136 flow [2024-06-03 19:09:18,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 437 transitions, 5819 flow, removed 87 selfloop flow, removed 5 redundant places. [2024-06-03 19:09:18,437 INFO L231 Difference]: Finished difference. Result has 342 places, 421 transitions, 4799 flow [2024-06-03 19:09:18,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4501, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4799, PETRI_PLACES=342, PETRI_TRANSITIONS=421} [2024-06-03 19:09:18,438 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 298 predicate places. [2024-06-03 19:09:18,438 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 421 transitions, 4799 flow [2024-06-03 19:09:18,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:09:18,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:09:18,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:09:18,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-03 19:09:18,438 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:09:18,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:09:18,439 INFO L85 PathProgramCache]: Analyzing trace with hash -11752881, now seen corresponding path program 8 times [2024-06-03 19:09:18,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:09:18,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488088946] [2024-06-03 19:09:18,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:09:18,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:09:18,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:09:19,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:09:19,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:09:19,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488088946] [2024-06-03 19:09:19,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488088946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:09:19,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:09:19,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:09:19,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428512022] [2024-06-03 19:09:19,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:09:19,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:09:19,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:09:19,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:09:19,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:09:19,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:09:19,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 421 transitions, 4799 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:09:19,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:09:19,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:09:19,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:09:20,852 INFO L124 PetriNetUnfolderBase]: 3385/5546 cut-off events. [2024-06-03 19:09:20,852 INFO L125 PetriNetUnfolderBase]: For 1042746/1042754 co-relation queries the response was YES. [2024-06-03 19:09:20,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58862 conditions, 5546 events. 3385/5546 cut-off events. For 1042746/1042754 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 34866 event pairs, 743 based on Foata normal form. 9/5554 useless extension candidates. Maximal degree in co-relation 58697. Up to 5094 conditions per place. [2024-06-03 19:09:20,940 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 354 selfloop transitions, 88 changer transitions 0/447 dead transitions. [2024-06-03 19:09:20,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 447 transitions, 6436 flow [2024-06-03 19:09:20,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:09:20,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:09:20,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-03 19:09:20,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-03 19:09:20,942 INFO L175 Difference]: Start difference. First operand has 342 places, 421 transitions, 4799 flow. Second operand 8 states and 143 transitions. [2024-06-03 19:09:20,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 447 transitions, 6436 flow [2024-06-03 19:09:23,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 447 transitions, 6186 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-03 19:09:23,208 INFO L231 Difference]: Finished difference. Result has 347 places, 434 transitions, 5091 flow [2024-06-03 19:09:23,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4549, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5091, PETRI_PLACES=347, PETRI_TRANSITIONS=434} [2024-06-03 19:09:23,209 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 303 predicate places. [2024-06-03 19:09:23,209 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 434 transitions, 5091 flow [2024-06-03 19:09:23,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:09:23,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:09:23,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:09:23,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-03 19:09:23,210 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:09:23,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:09:23,210 INFO L85 PathProgramCache]: Analyzing trace with hash 2049805794, now seen corresponding path program 10 times [2024-06-03 19:09:23,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:09:23,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682746070] [2024-06-03 19:09:23,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:09:23,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:09:23,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:09:24,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:09:24,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:09:24,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682746070] [2024-06-03 19:09:24,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682746070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:09:24,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:09:24,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:09:24,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77480630] [2024-06-03 19:09:24,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:09:24,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:09:24,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:09:24,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:09:24,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:09:24,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:09:24,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 434 transitions, 5091 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:09:24,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:09:24,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:09:24,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:09:25,651 INFO L124 PetriNetUnfolderBase]: 3390/5554 cut-off events. [2024-06-03 19:09:25,651 INFO L125 PetriNetUnfolderBase]: For 1062728/1062730 co-relation queries the response was YES. [2024-06-03 19:09:25,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59348 conditions, 5554 events. 3390/5554 cut-off events. For 1062728/1062730 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 34856 event pairs, 767 based on Foata normal form. 3/5556 useless extension candidates. Maximal degree in co-relation 59180. Up to 5035 conditions per place. [2024-06-03 19:09:25,740 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 351 selfloop transitions, 95 changer transitions 0/451 dead transitions. [2024-06-03 19:09:25,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 451 transitions, 6529 flow [2024-06-03 19:09:25,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:09:25,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:09:25,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-03 19:09:25,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-03 19:09:25,742 INFO L175 Difference]: Start difference. First operand has 347 places, 434 transitions, 5091 flow. Second operand 8 states and 143 transitions. [2024-06-03 19:09:25,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 451 transitions, 6529 flow [2024-06-03 19:09:28,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 451 transitions, 6317 flow, removed 81 selfloop flow, removed 3 redundant places. [2024-06-03 19:09:28,486 INFO L231 Difference]: Finished difference. Result has 352 places, 440 transitions, 5381 flow [2024-06-03 19:09:28,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4891, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5381, PETRI_PLACES=352, PETRI_TRANSITIONS=440} [2024-06-03 19:09:28,487 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 308 predicate places. [2024-06-03 19:09:28,487 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 440 transitions, 5381 flow [2024-06-03 19:09:28,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:09:28,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:09:28,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:09:28,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-03 19:09:28,488 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:09:28,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:09:28,488 INFO L85 PathProgramCache]: Analyzing trace with hash 630225433, now seen corresponding path program 9 times [2024-06-03 19:09:28,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:09:28,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680034581] [2024-06-03 19:09:28,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:09:28,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:09:28,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:09:29,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:09:29,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:09:29,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680034581] [2024-06-03 19:09:29,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680034581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:09:29,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:09:29,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:09:29,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489115241] [2024-06-03 19:09:29,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:09:29,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:09:29,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:09:29,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:09:29,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:09:29,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:09:29,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 440 transitions, 5381 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:09:29,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:09:29,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:09:29,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:09:31,144 INFO L124 PetriNetUnfolderBase]: 3395/5566 cut-off events. [2024-06-03 19:09:31,145 INFO L125 PetriNetUnfolderBase]: For 1076832/1076840 co-relation queries the response was YES. [2024-06-03 19:09:31,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59247 conditions, 5566 events. 3395/5566 cut-off events. For 1076832/1076840 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 34987 event pairs, 746 based on Foata normal form. 9/5574 useless extension candidates. Maximal degree in co-relation 59077. Up to 5162 conditions per place. [2024-06-03 19:09:31,231 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 399 selfloop transitions, 50 changer transitions 0/454 dead transitions. [2024-06-03 19:09:31,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 454 transitions, 6403 flow [2024-06-03 19:09:31,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:09:31,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:09:31,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-03 19:09:31,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-03 19:09:31,233 INFO L175 Difference]: Start difference. First operand has 352 places, 440 transitions, 5381 flow. Second operand 8 states and 139 transitions. [2024-06-03 19:09:31,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 454 transitions, 6403 flow [2024-06-03 19:09:33,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 454 transitions, 6161 flow, removed 77 selfloop flow, removed 4 redundant places. [2024-06-03 19:09:33,843 INFO L231 Difference]: Finished difference. Result has 356 places, 443 transitions, 5343 flow [2024-06-03 19:09:33,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5139, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5343, PETRI_PLACES=356, PETRI_TRANSITIONS=443} [2024-06-03 19:09:33,843 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 312 predicate places. [2024-06-03 19:09:33,843 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 443 transitions, 5343 flow [2024-06-03 19:09:33,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:09:33,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:09:33,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:09:33,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-03 19:09:33,844 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:09:33,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:09:33,845 INFO L85 PathProgramCache]: Analyzing trace with hash 453093913, now seen corresponding path program 10 times [2024-06-03 19:09:33,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:09:33,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725911804] [2024-06-03 19:09:33,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:09:33,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:09:33,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:09:35,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:09:35,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:09:35,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725911804] [2024-06-03 19:09:35,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725911804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:09:35,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:09:35,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:09:35,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038420351] [2024-06-03 19:09:35,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:09:35,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:09:35,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:09:35,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:09:35,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:09:35,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:09:35,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 443 transitions, 5343 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:09:35,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:09:35,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:09:35,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:09:36,513 INFO L124 PetriNetUnfolderBase]: 3392/5558 cut-off events. [2024-06-03 19:09:36,514 INFO L125 PetriNetUnfolderBase]: For 1080193/1080201 co-relation queries the response was YES. [2024-06-03 19:09:36,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58845 conditions, 5558 events. 3392/5558 cut-off events. For 1080193/1080201 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 34889 event pairs, 743 based on Foata normal form. 9/5566 useless extension candidates. Maximal degree in co-relation 58673. Up to 5158 conditions per place. [2024-06-03 19:09:36,605 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 400 selfloop transitions, 50 changer transitions 0/455 dead transitions. [2024-06-03 19:09:36,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 455 transitions, 6293 flow [2024-06-03 19:09:36,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:09:36,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:09:36,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-03 19:09:36,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-03 19:09:36,607 INFO L175 Difference]: Start difference. First operand has 356 places, 443 transitions, 5343 flow. Second operand 8 states and 139 transitions. [2024-06-03 19:09:36,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 455 transitions, 6293 flow [2024-06-03 19:09:39,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 455 transitions, 6045 flow, removed 76 selfloop flow, removed 6 redundant places. [2024-06-03 19:09:39,250 INFO L231 Difference]: Finished difference. Result has 358 places, 444 transitions, 5221 flow [2024-06-03 19:09:39,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5101, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5221, PETRI_PLACES=358, PETRI_TRANSITIONS=444} [2024-06-03 19:09:39,250 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 314 predicate places. [2024-06-03 19:09:39,251 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 444 transitions, 5221 flow [2024-06-03 19:09:39,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:09:39,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:09:39,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:09:39,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-03 19:09:39,251 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:09:39,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:09:39,252 INFO L85 PathProgramCache]: Analyzing trace with hash 453093510, now seen corresponding path program 11 times [2024-06-03 19:09:39,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:09:39,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497971506] [2024-06-03 19:09:39,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:09:39,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:09:39,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:09:40,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:09:40,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:09:40,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497971506] [2024-06-03 19:09:40,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497971506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:09:40,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:09:40,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:09:40,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519308890] [2024-06-03 19:09:40,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:09:40,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:09:40,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:09:40,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:09:40,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:09:40,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:09:40,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 444 transitions, 5221 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:09:40,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:09:40,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:09:40,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:09:41,617 INFO L124 PetriNetUnfolderBase]: 3397/5568 cut-off events. [2024-06-03 19:09:41,618 INFO L125 PetriNetUnfolderBase]: For 1097710/1097712 co-relation queries the response was YES. [2024-06-03 19:09:41,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58998 conditions, 5568 events. 3397/5568 cut-off events. For 1097710/1097712 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 35004 event pairs, 770 based on Foata normal form. 3/5570 useless extension candidates. Maximal degree in co-relation 58825. Up to 5044 conditions per place. [2024-06-03 19:09:41,704 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 357 selfloop transitions, 96 changer transitions 0/458 dead transitions. [2024-06-03 19:09:41,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 458 transitions, 6519 flow [2024-06-03 19:09:41,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:09:41,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:09:41,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-03 19:09:41,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-03 19:09:41,705 INFO L175 Difference]: Start difference. First operand has 358 places, 444 transitions, 5221 flow. Second operand 8 states and 144 transitions. [2024-06-03 19:09:41,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 458 transitions, 6519 flow [2024-06-03 19:09:44,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 458 transitions, 6407 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-03 19:09:44,268 INFO L231 Difference]: Finished difference. Result has 360 places, 447 transitions, 5447 flow [2024-06-03 19:09:44,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5109, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5447, PETRI_PLACES=360, PETRI_TRANSITIONS=447} [2024-06-03 19:09:44,268 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 316 predicate places. [2024-06-03 19:09:44,268 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 447 transitions, 5447 flow [2024-06-03 19:09:44,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:09:44,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:09:44,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:09:44,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-03 19:09:44,269 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:09:44,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:09:44,269 INFO L85 PathProgramCache]: Analyzing trace with hash 453360823, now seen corresponding path program 11 times [2024-06-03 19:09:44,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:09:44,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425181925] [2024-06-03 19:09:44,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:09:44,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:09:44,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:09:45,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:09:45,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:09:45,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425181925] [2024-06-03 19:09:45,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425181925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:09:45,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:09:45,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:09:45,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769876909] [2024-06-03 19:09:45,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:09:45,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:09:45,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:09:45,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:09:45,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:09:45,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:09:45,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 447 transitions, 5447 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:09:45,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:09:45,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:09:45,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:09:46,840 INFO L124 PetriNetUnfolderBase]: 3402/5580 cut-off events. [2024-06-03 19:09:46,841 INFO L125 PetriNetUnfolderBase]: For 1115073/1115081 co-relation queries the response was YES. [2024-06-03 19:09:46,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59374 conditions, 5580 events. 3402/5580 cut-off events. For 1115073/1115081 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 35130 event pairs, 744 based on Foata normal form. 9/5588 useless extension candidates. Maximal degree in co-relation 59200. Up to 5160 conditions per place. [2024-06-03 19:09:46,931 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 396 selfloop transitions, 61 changer transitions 0/462 dead transitions. [2024-06-03 19:09:46,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 462 transitions, 6491 flow [2024-06-03 19:09:46,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:09:46,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:09:46,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-03 19:09:46,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-03 19:09:46,932 INFO L175 Difference]: Start difference. First operand has 360 places, 447 transitions, 5447 flow. Second operand 8 states and 140 transitions. [2024-06-03 19:09:46,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 462 transitions, 6491 flow [2024-06-03 19:09:50,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 462 transitions, 6095 flow, removed 68 selfloop flow, removed 7 redundant places. [2024-06-03 19:09:50,046 INFO L231 Difference]: Finished difference. Result has 362 places, 451 transitions, 5301 flow [2024-06-03 19:09:50,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5051, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5301, PETRI_PLACES=362, PETRI_TRANSITIONS=451} [2024-06-03 19:09:50,047 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 318 predicate places. [2024-06-03 19:09:50,047 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 451 transitions, 5301 flow [2024-06-03 19:09:50,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:09:50,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:09:50,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:09:50,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-03 19:09:50,048 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:09:50,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:09:50,048 INFO L85 PathProgramCache]: Analyzing trace with hash 576276139, now seen corresponding path program 12 times [2024-06-03 19:09:50,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:09:50,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720530242] [2024-06-03 19:09:50,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:09:50,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:09:50,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:09:51,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:09:51,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:09:51,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720530242] [2024-06-03 19:09:51,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720530242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:09:51,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:09:51,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:09:51,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262258670] [2024-06-03 19:09:51,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:09:51,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:09:51,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:09:51,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:09:51,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:09:51,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:09:51,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 451 transitions, 5301 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:09:51,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:09:51,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:09:51,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:09:52,860 INFO L124 PetriNetUnfolderBase]: 3399/5572 cut-off events. [2024-06-03 19:09:52,860 INFO L125 PetriNetUnfolderBase]: For 1124737/1124745 co-relation queries the response was YES. [2024-06-03 19:09:52,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59019 conditions, 5572 events. 3399/5572 cut-off events. For 1124737/1124745 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 35059 event pairs, 744 based on Foata normal form. 9/5580 useless extension candidates. Maximal degree in co-relation 58844. Up to 5114 conditions per place. [2024-06-03 19:09:52,948 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 361 selfloop transitions, 97 changer transitions 0/463 dead transitions. [2024-06-03 19:09:52,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 463 transitions, 6264 flow [2024-06-03 19:09:52,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:09:52,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:09:52,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-03 19:09:52,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-03 19:09:52,949 INFO L175 Difference]: Start difference. First operand has 362 places, 451 transitions, 5301 flow. Second operand 8 states and 141 transitions. [2024-06-03 19:09:52,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 463 transitions, 6264 flow [2024-06-03 19:09:55,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 463 transitions, 6022 flow, removed 70 selfloop flow, removed 5 redundant places. [2024-06-03 19:09:55,451 INFO L231 Difference]: Finished difference. Result has 365 places, 452 transitions, 5274 flow [2024-06-03 19:09:55,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5065, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5274, PETRI_PLACES=365, PETRI_TRANSITIONS=452} [2024-06-03 19:09:55,452 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 321 predicate places. [2024-06-03 19:09:55,452 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 452 transitions, 5274 flow [2024-06-03 19:09:55,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:09:55,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:09:55,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:09:55,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-03 19:09:55,452 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:09:55,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:09:55,453 INFO L85 PathProgramCache]: Analyzing trace with hash 453093696, now seen corresponding path program 12 times [2024-06-03 19:09:55,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:09:55,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071031448] [2024-06-03 19:09:55,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:09:55,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:09:55,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:09:56,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:09:56,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:09:56,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071031448] [2024-06-03 19:09:56,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071031448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:09:56,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:09:56,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:09:56,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68241735] [2024-06-03 19:09:56,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:09:56,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:09:56,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:09:56,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:09:56,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:09:56,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:09:56,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 452 transitions, 5274 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:09:56,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:09:56,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:09:56,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:09:57,951 INFO L124 PetriNetUnfolderBase]: 3393/5567 cut-off events. [2024-06-03 19:09:57,951 INFO L125 PetriNetUnfolderBase]: For 1136155/1136163 co-relation queries the response was YES. [2024-06-03 19:09:58,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58787 conditions, 5567 events. 3393/5567 cut-off events. For 1136155/1136163 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 35093 event pairs, 755 based on Foata normal form. 10/5576 useless extension candidates. Maximal degree in co-relation 58611. Up to 5031 conditions per place. [2024-06-03 19:09:58,044 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 366 selfloop transitions, 95 changer transitions 0/466 dead transitions. [2024-06-03 19:09:58,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 466 transitions, 6300 flow [2024-06-03 19:09:58,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:09:58,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:09:58,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-03 19:09:58,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40568475452196384 [2024-06-03 19:09:58,045 INFO L175 Difference]: Start difference. First operand has 365 places, 452 transitions, 5274 flow. Second operand 9 states and 157 transitions. [2024-06-03 19:09:58,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 466 transitions, 6300 flow [2024-06-03 19:10:01,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 466 transitions, 6058 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-03 19:10:01,107 INFO L231 Difference]: Finished difference. Result has 369 places, 452 transitions, 5228 flow [2024-06-03 19:10:01,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5032, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5228, PETRI_PLACES=369, PETRI_TRANSITIONS=452} [2024-06-03 19:10:01,107 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 325 predicate places. [2024-06-03 19:10:01,107 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 452 transitions, 5228 flow [2024-06-03 19:10:01,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:10:01,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:10:01,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:10:01,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-03 19:10:01,108 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:10:01,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:10:01,109 INFO L85 PathProgramCache]: Analyzing trace with hash 452973540, now seen corresponding path program 12 times [2024-06-03 19:10:01,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:10:01,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742868989] [2024-06-03 19:10:01,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:10:01,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:10:01,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:10:02,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:10:02,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:10:02,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742868989] [2024-06-03 19:10:02,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742868989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:10:02,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:10:02,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:10:02,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378510168] [2024-06-03 19:10:02,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:10:02,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:10:02,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:10:02,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:10:02,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:10:02,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:10:02,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 452 transitions, 5228 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:10:02,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:10:02,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:10:02,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:10:03,613 INFO L124 PetriNetUnfolderBase]: 3390/5553 cut-off events. [2024-06-03 19:10:03,613 INFO L125 PetriNetUnfolderBase]: For 1139517/1139517 co-relation queries the response was YES. [2024-06-03 19:10:03,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58668 conditions, 5553 events. 3390/5553 cut-off events. For 1139517/1139517 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 34837 event pairs, 739 based on Foata normal form. 1/5553 useless extension candidates. Maximal degree in co-relation 58492. Up to 5168 conditions per place. [2024-06-03 19:10:03,704 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 420 selfloop transitions, 37 changer transitions 0/462 dead transitions. [2024-06-03 19:10:03,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 462 transitions, 6168 flow [2024-06-03 19:10:03,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:10:03,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:10:03,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-03 19:10:03,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-03 19:10:03,705 INFO L175 Difference]: Start difference. First operand has 369 places, 452 transitions, 5228 flow. Second operand 8 states and 138 transitions. [2024-06-03 19:10:03,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 462 transitions, 6168 flow [2024-06-03 19:10:07,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 462 transitions, 5784 flow, removed 61 selfloop flow, removed 10 redundant places. [2024-06-03 19:10:07,361 INFO L231 Difference]: Finished difference. Result has 367 places, 452 transitions, 4924 flow [2024-06-03 19:10:07,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4844, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4924, PETRI_PLACES=367, PETRI_TRANSITIONS=452} [2024-06-03 19:10:07,362 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 323 predicate places. [2024-06-03 19:10:07,362 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 452 transitions, 4924 flow [2024-06-03 19:10:07,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:10:07,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:10:07,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:10:07,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-03 19:10:07,363 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:10:07,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:10:07,363 INFO L85 PathProgramCache]: Analyzing trace with hash -24805090, now seen corresponding path program 4 times [2024-06-03 19:10:07,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:10:07,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141226692] [2024-06-03 19:10:07,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:10:07,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:10:07,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:10:08,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:10:08,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:10:08,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141226692] [2024-06-03 19:10:08,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141226692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:10:08,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:10:08,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:10:08,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694299838] [2024-06-03 19:10:08,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:10:08,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:10:08,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:10:08,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:10:08,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:10:08,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:10:08,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 452 transitions, 4924 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:10:08,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:10:08,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:10:08,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:10:10,040 INFO L124 PetriNetUnfolderBase]: 3284/5419 cut-off events. [2024-06-03 19:10:10,041 INFO L125 PetriNetUnfolderBase]: For 1147203/1147203 co-relation queries the response was YES. [2024-06-03 19:10:10,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57286 conditions, 5419 events. 3284/5419 cut-off events. For 1147203/1147203 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 34397 event pairs, 721 based on Foata normal form. 2/5384 useless extension candidates. Maximal degree in co-relation 57110. Up to 4839 conditions per place. [2024-06-03 19:10:10,139 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 372 selfloop transitions, 36 changer transitions 0/465 dead transitions. [2024-06-03 19:10:10,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 465 transitions, 5860 flow [2024-06-03 19:10:10,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:10:10,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:10:10,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-03 19:10:10,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-03 19:10:10,141 INFO L175 Difference]: Start difference. First operand has 367 places, 452 transitions, 4924 flow. Second operand 8 states and 145 transitions. [2024-06-03 19:10:10,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 465 transitions, 5860 flow [2024-06-03 19:10:13,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 465 transitions, 5708 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-03 19:10:13,087 INFO L231 Difference]: Finished difference. Result has 366 places, 454 transitions, 4945 flow [2024-06-03 19:10:13,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4772, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4945, PETRI_PLACES=366, PETRI_TRANSITIONS=454} [2024-06-03 19:10:13,088 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 322 predicate places. [2024-06-03 19:10:13,088 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 454 transitions, 4945 flow [2024-06-03 19:10:13,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:10:13,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:10:13,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:10:13,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-03 19:10:13,088 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:10:13,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:10:13,089 INFO L85 PathProgramCache]: Analyzing trace with hash -24404911, now seen corresponding path program 2 times [2024-06-03 19:10:13,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:10:13,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010043255] [2024-06-03 19:10:13,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:10:13,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:10:13,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:10:14,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:10:14,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:10:14,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010043255] [2024-06-03 19:10:14,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010043255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:10:14,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:10:14,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:10:14,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138301530] [2024-06-03 19:10:14,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:10:14,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:10:14,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:10:14,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:10:14,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:10:14,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-03 19:10:14,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 454 transitions, 4945 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:10:14,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:10:14,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-03 19:10:14,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:10:15,762 INFO L124 PetriNetUnfolderBase]: 3104/5174 cut-off events. [2024-06-03 19:10:15,763 INFO L125 PetriNetUnfolderBase]: For 1161486/1161542 co-relation queries the response was YES. [2024-06-03 19:10:15,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56002 conditions, 5174 events. 3104/5174 cut-off events. For 1161486/1161542 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 33303 event pairs, 685 based on Foata normal form. 8/5101 useless extension candidates. Maximal degree in co-relation 55826. Up to 4435 conditions per place. [2024-06-03 19:10:15,840 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 314 selfloop transitions, 43 changer transitions 0/467 dead transitions. [2024-06-03 19:10:15,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 467 transitions, 5785 flow [2024-06-03 19:10:15,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:10:15,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:10:15,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-03 19:10:15,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-03 19:10:15,841 INFO L175 Difference]: Start difference. First operand has 366 places, 454 transitions, 4945 flow. Second operand 8 states and 151 transitions. [2024-06-03 19:10:15,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 467 transitions, 5785 flow [2024-06-03 19:10:18,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 467 transitions, 5628 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-03 19:10:18,925 INFO L231 Difference]: Finished difference. Result has 368 places, 457 transitions, 4989 flow [2024-06-03 19:10:18,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4788, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4989, PETRI_PLACES=368, PETRI_TRANSITIONS=457} [2024-06-03 19:10:18,925 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 324 predicate places. [2024-06-03 19:10:18,925 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 457 transitions, 4989 flow [2024-06-03 19:10:18,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:10:18,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:10:18,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:10:18,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-03 19:10:18,926 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:10:18,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:10:18,926 INFO L85 PathProgramCache]: Analyzing trace with hash 881467413, now seen corresponding path program 3 times [2024-06-03 19:10:18,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:10:18,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891197991] [2024-06-03 19:10:18,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:10:18,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:10:18,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:10:20,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:10:20,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:10:20,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891197991] [2024-06-03 19:10:20,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891197991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:10:20,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:10:20,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:10:20,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118456989] [2024-06-03 19:10:20,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:10:20,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:10:20,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:10:20,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:10:20,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:10:20,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-03 19:10:20,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 457 transitions, 4989 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:10:20,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:10:20,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-03 19:10:20,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:10:21,918 INFO L124 PetriNetUnfolderBase]: 3120/5193 cut-off events. [2024-06-03 19:10:21,918 INFO L125 PetriNetUnfolderBase]: For 1179471/1179503 co-relation queries the response was YES. [2024-06-03 19:10:21,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56610 conditions, 5193 events. 3120/5193 cut-off events. For 1179471/1179503 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 33344 event pairs, 685 based on Foata normal form. 12/5125 useless extension candidates. Maximal degree in co-relation 56433. Up to 4422 conditions per place. [2024-06-03 19:10:21,997 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 298 selfloop transitions, 63 changer transitions 0/471 dead transitions. [2024-06-03 19:10:21,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 471 transitions, 5845 flow [2024-06-03 19:10:21,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:10:21,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:10:21,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-03 19:10:21,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-03 19:10:21,998 INFO L175 Difference]: Start difference. First operand has 368 places, 457 transitions, 4989 flow. Second operand 9 states and 169 transitions. [2024-06-03 19:10:21,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 471 transitions, 5845 flow [2024-06-03 19:10:25,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 471 transitions, 5676 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-03 19:10:25,196 INFO L231 Difference]: Finished difference. Result has 371 places, 460 transitions, 5064 flow [2024-06-03 19:10:25,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4820, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5064, PETRI_PLACES=371, PETRI_TRANSITIONS=460} [2024-06-03 19:10:25,197 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 327 predicate places. [2024-06-03 19:10:25,197 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 460 transitions, 5064 flow [2024-06-03 19:10:25,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:10:25,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:10:25,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:10:25,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-03 19:10:25,198 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:10:25,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:10:25,198 INFO L85 PathProgramCache]: Analyzing trace with hash 896704533, now seen corresponding path program 4 times [2024-06-03 19:10:25,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:10:25,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185403734] [2024-06-03 19:10:25,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:10:25,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:10:25,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:10:26,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:10:26,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:10:26,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185403734] [2024-06-03 19:10:26,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185403734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:10:26,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:10:26,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:10:26,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063479501] [2024-06-03 19:10:26,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:10:26,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:10:26,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:10:26,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:10:26,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:10:26,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-03 19:10:26,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 460 transitions, 5064 flow. Second operand has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:10:26,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:10:26,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-03 19:10:26,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:10:28,002 INFO L124 PetriNetUnfolderBase]: 3096/5178 cut-off events. [2024-06-03 19:10:28,002 INFO L125 PetriNetUnfolderBase]: For 1190652/1190664 co-relation queries the response was YES. [2024-06-03 19:10:28,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56495 conditions, 5178 events. 3096/5178 cut-off events. For 1190652/1190664 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 33473 event pairs, 682 based on Foata normal form. 10/5114 useless extension candidates. Maximal degree in co-relation 56317. Up to 4485 conditions per place. [2024-06-03 19:10:28,083 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 341 selfloop transitions, 22 changer transitions 0/473 dead transitions. [2024-06-03 19:10:28,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 473 transitions, 5928 flow [2024-06-03 19:10:28,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:10:28,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:10:28,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 19:10:28,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-03 19:10:28,084 INFO L175 Difference]: Start difference. First operand has 371 places, 460 transitions, 5064 flow. Second operand 8 states and 150 transitions. [2024-06-03 19:10:28,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 473 transitions, 5928 flow [2024-06-03 19:10:30,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 473 transitions, 5706 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-06-03 19:10:30,989 INFO L231 Difference]: Finished difference. Result has 372 places, 463 transitions, 5013 flow [2024-06-03 19:10:30,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4842, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5013, PETRI_PLACES=372, PETRI_TRANSITIONS=463} [2024-06-03 19:10:30,989 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 328 predicate places. [2024-06-03 19:10:30,989 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 463 transitions, 5013 flow [2024-06-03 19:10:30,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.88888888888889) internal successors, (125), 9 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:10:30,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:10:30,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:10:30,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-03 19:10:30,990 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:10:30,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:10:30,990 INFO L85 PathProgramCache]: Analyzing trace with hash -546833281, now seen corresponding path program 1 times [2024-06-03 19:10:30,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:10:30,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623475576] [2024-06-03 19:10:30,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:10:30,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:10:31,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:10:32,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:10:32,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:10:32,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623475576] [2024-06-03 19:10:32,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623475576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:10:32,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:10:32,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:10:32,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249012743] [2024-06-03 19:10:32,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:10:32,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:10:32,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:10:32,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:10:32,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:10:32,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:10:32,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 463 transitions, 5013 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:10:32,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:10:32,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:10:32,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:10:33,813 INFO L124 PetriNetUnfolderBase]: 3305/5487 cut-off events. [2024-06-03 19:10:33,813 INFO L125 PetriNetUnfolderBase]: For 1236644/1236653 co-relation queries the response was YES. [2024-06-03 19:10:33,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58870 conditions, 5487 events. 3305/5487 cut-off events. For 1236644/1236653 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 35124 event pairs, 704 based on Foata normal form. 5/5491 useless extension candidates. Maximal degree in co-relation 58691. Up to 5001 conditions per place. [2024-06-03 19:10:33,895 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 438 selfloop transitions, 21 changer transitions 0/487 dead transitions. [2024-06-03 19:10:33,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 487 transitions, 6109 flow [2024-06-03 19:10:33,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:10:33,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:10:33,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-03 19:10:33,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-03 19:10:33,897 INFO L175 Difference]: Start difference. First operand has 372 places, 463 transitions, 5013 flow. Second operand 9 states and 166 transitions. [2024-06-03 19:10:33,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 487 transitions, 6109 flow [2024-06-03 19:10:36,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 487 transitions, 5970 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-03 19:10:36,926 INFO L231 Difference]: Finished difference. Result has 375 places, 466 transitions, 5028 flow [2024-06-03 19:10:36,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4874, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5028, PETRI_PLACES=375, PETRI_TRANSITIONS=466} [2024-06-03 19:10:36,927 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 331 predicate places. [2024-06-03 19:10:36,927 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 466 transitions, 5028 flow [2024-06-03 19:10:36,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:10:36,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:10:36,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:10:36,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-03 19:10:36,928 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:10:36,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:10:36,928 INFO L85 PathProgramCache]: Analyzing trace with hash 880707039, now seen corresponding path program 2 times [2024-06-03 19:10:36,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:10:36,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691679049] [2024-06-03 19:10:36,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:10:36,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:10:36,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:10:38,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:10:38,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:10:38,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691679049] [2024-06-03 19:10:38,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691679049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:10:38,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:10:38,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:10:38,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871082119] [2024-06-03 19:10:38,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:10:38,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:10:38,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:10:38,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:10:38,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:10:38,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:10:38,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 466 transitions, 5028 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:10:38,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:10:38,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:10:38,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:10:40,088 INFO L124 PetriNetUnfolderBase]: 3308/5496 cut-off events. [2024-06-03 19:10:40,088 INFO L125 PetriNetUnfolderBase]: For 1241723/1241732 co-relation queries the response was YES. [2024-06-03 19:10:40,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59288 conditions, 5496 events. 3308/5496 cut-off events. For 1241723/1241732 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 35260 event pairs, 700 based on Foata normal form. 11/5506 useless extension candidates. Maximal degree in co-relation 59108. Up to 5009 conditions per place. [2024-06-03 19:10:40,175 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 437 selfloop transitions, 22 changer transitions 0/487 dead transitions. [2024-06-03 19:10:40,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 487 transitions, 6122 flow [2024-06-03 19:10:40,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:10:40,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:10:40,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-03 19:10:40,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-03 19:10:40,177 INFO L175 Difference]: Start difference. First operand has 375 places, 466 transitions, 5028 flow. Second operand 9 states and 164 transitions. [2024-06-03 19:10:40,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 487 transitions, 6122 flow [2024-06-03 19:10:43,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 487 transitions, 6000 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-03 19:10:43,173 INFO L231 Difference]: Finished difference. Result has 377 places, 469 transitions, 5066 flow [2024-06-03 19:10:43,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4906, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5066, PETRI_PLACES=377, PETRI_TRANSITIONS=469} [2024-06-03 19:10:43,173 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 333 predicate places. [2024-06-03 19:10:43,173 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 469 transitions, 5066 flow [2024-06-03 19:10:43,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:10:43,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:10:43,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:10:43,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-03 19:10:43,174 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:10:43,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:10:43,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1024807315, now seen corresponding path program 1 times [2024-06-03 19:10:43,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:10:43,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839052121] [2024-06-03 19:10:43,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:10:43,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:10:43,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:10:44,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:10:44,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:10:44,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839052121] [2024-06-03 19:10:44,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839052121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:10:44,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:10:44,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:10:44,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800444701] [2024-06-03 19:10:44,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:10:44,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:10:44,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:10:44,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:10:44,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:10:44,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:10:44,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 469 transitions, 5066 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:10:44,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:10:44,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:10:44,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:10:46,096 INFO L124 PetriNetUnfolderBase]: 3421/5608 cut-off events. [2024-06-03 19:10:46,096 INFO L125 PetriNetUnfolderBase]: For 1246615/1246615 co-relation queries the response was YES. [2024-06-03 19:10:46,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60473 conditions, 5608 events. 3421/5608 cut-off events. For 1246615/1246615 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 35408 event pairs, 733 based on Foata normal form. 1/5608 useless extension candidates. Maximal degree in co-relation 60292. Up to 5269 conditions per place. [2024-06-03 19:10:46,187 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 460 selfloop transitions, 21 changer transitions 0/486 dead transitions. [2024-06-03 19:10:46,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 486 transitions, 6172 flow [2024-06-03 19:10:46,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:10:46,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:10:46,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-03 19:10:46,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39018087855297157 [2024-06-03 19:10:46,189 INFO L175 Difference]: Start difference. First operand has 377 places, 469 transitions, 5066 flow. Second operand 9 states and 151 transitions. [2024-06-03 19:10:46,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 486 transitions, 6172 flow [2024-06-03 19:10:49,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 486 transitions, 6034 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-03 19:10:49,370 INFO L231 Difference]: Finished difference. Result has 379 places, 472 transitions, 5088 flow [2024-06-03 19:10:49,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4928, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5088, PETRI_PLACES=379, PETRI_TRANSITIONS=472} [2024-06-03 19:10:49,371 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 335 predicate places. [2024-06-03 19:10:49,371 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 472 transitions, 5088 flow [2024-06-03 19:10:49,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:10:49,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:10:49,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:10:49,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-03 19:10:49,371 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:10:49,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:10:49,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1024799379, now seen corresponding path program 3 times [2024-06-03 19:10:49,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:10:49,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695302728] [2024-06-03 19:10:49,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:10:49,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:10:49,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:10:50,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:10:50,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:10:50,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695302728] [2024-06-03 19:10:50,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695302728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:10:50,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:10:50,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:10:50,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813780895] [2024-06-03 19:10:50,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:10:50,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:10:50,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:10:50,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:10:50,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:10:51,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:10:51,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 472 transitions, 5088 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:10:51,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:10:51,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:10:51,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:10:52,657 INFO L124 PetriNetUnfolderBase]: 3322/5525 cut-off events. [2024-06-03 19:10:52,657 INFO L125 PetriNetUnfolderBase]: For 1290022/1290026 co-relation queries the response was YES. [2024-06-03 19:10:52,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60291 conditions, 5525 events. 3322/5525 cut-off events. For 1290022/1290026 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 35531 event pairs, 698 based on Foata normal form. 2/5525 useless extension candidates. Maximal degree in co-relation 60109. Up to 4994 conditions per place. [2024-06-03 19:10:52,748 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 424 selfloop transitions, 42 changer transitions 0/494 dead transitions. [2024-06-03 19:10:52,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 494 transitions, 6552 flow [2024-06-03 19:10:52,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:10:52,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:10:52,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-03 19:10:52,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-03 19:10:52,750 INFO L175 Difference]: Start difference. First operand has 379 places, 472 transitions, 5088 flow. Second operand 9 states and 165 transitions. [2024-06-03 19:10:52,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 494 transitions, 6552 flow [2024-06-03 19:10:57,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 494 transitions, 6380 flow, removed 52 selfloop flow, removed 8 redundant places. [2024-06-03 19:10:57,254 INFO L231 Difference]: Finished difference. Result has 380 places, 478 transitions, 5232 flow [2024-06-03 19:10:57,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4916, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5232, PETRI_PLACES=380, PETRI_TRANSITIONS=478} [2024-06-03 19:10:57,255 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 336 predicate places. [2024-06-03 19:10:57,255 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 478 transitions, 5232 flow [2024-06-03 19:10:57,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:10:57,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:10:57,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:10:57,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-03 19:10:57,257 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:10:57,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:10:57,263 INFO L85 PathProgramCache]: Analyzing trace with hash -399218101, now seen corresponding path program 4 times [2024-06-03 19:10:57,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:10:57,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071333788] [2024-06-03 19:10:57,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:10:57,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:10:57,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:10:58,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:10:58,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:10:58,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071333788] [2024-06-03 19:10:58,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071333788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:10:58,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:10:58,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:10:58,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140744208] [2024-06-03 19:10:58,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:10:58,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:10:58,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:10:58,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:10:58,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:10:58,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:10:58,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 478 transitions, 5232 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:10:58,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:10:58,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:10:58,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:11:00,296 INFO L124 PetriNetUnfolderBase]: 3331/5539 cut-off events. [2024-06-03 19:11:00,297 INFO L125 PetriNetUnfolderBase]: For 1315336/1315340 co-relation queries the response was YES. [2024-06-03 19:11:00,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60896 conditions, 5539 events. 3331/5539 cut-off events. For 1315336/1315340 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 35593 event pairs, 697 based on Foata normal form. 2/5540 useless extension candidates. Maximal degree in co-relation 60714. Up to 5020 conditions per place. [2024-06-03 19:11:00,392 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 437 selfloop transitions, 36 changer transitions 0/501 dead transitions. [2024-06-03 19:11:00,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 501 transitions, 6744 flow [2024-06-03 19:11:00,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:11:00,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:11:00,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-03 19:11:00,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-03 19:11:00,393 INFO L175 Difference]: Start difference. First operand has 380 places, 478 transitions, 5232 flow. Second operand 9 states and 167 transitions. [2024-06-03 19:11:00,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 501 transitions, 6744 flow [2024-06-03 19:11:03,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 501 transitions, 6536 flow, removed 90 selfloop flow, removed 5 redundant places. [2024-06-03 19:11:03,937 INFO L231 Difference]: Finished difference. Result has 384 places, 484 transitions, 5340 flow [2024-06-03 19:11:03,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5024, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5340, PETRI_PLACES=384, PETRI_TRANSITIONS=484} [2024-06-03 19:11:03,937 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 340 predicate places. [2024-06-03 19:11:03,937 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 484 transitions, 5340 flow [2024-06-03 19:11:03,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:11:03,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:11:03,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:11:03,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-03 19:11:03,939 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:11:03,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:11:03,940 INFO L85 PathProgramCache]: Analyzing trace with hash 630678839, now seen corresponding path program 5 times [2024-06-03 19:11:03,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:11:03,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572662613] [2024-06-03 19:11:03,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:11:03,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:11:03,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:11:05,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:11:05,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:11:05,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572662613] [2024-06-03 19:11:05,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572662613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:11:05,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:11:05,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:11:05,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123889402] [2024-06-03 19:11:05,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:11:05,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:11:05,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:11:05,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:11:05,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:11:05,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:11:05,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 484 transitions, 5340 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:11:05,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:11:05,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:11:05,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:11:07,352 INFO L124 PetriNetUnfolderBase]: 3348/5574 cut-off events. [2024-06-03 19:11:07,352 INFO L125 PetriNetUnfolderBase]: For 1348423/1348429 co-relation queries the response was YES. [2024-06-03 19:11:07,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61883 conditions, 5574 events. 3348/5574 cut-off events. For 1348423/1348429 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 35993 event pairs, 704 based on Foata normal form. 4/5576 useless extension candidates. Maximal degree in co-relation 61699. Up to 5028 conditions per place. [2024-06-03 19:11:07,452 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 433 selfloop transitions, 43 changer transitions 0/504 dead transitions. [2024-06-03 19:11:07,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 504 transitions, 6858 flow [2024-06-03 19:11:07,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:11:07,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:11:07,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-03 19:11:07,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-03 19:11:07,461 INFO L175 Difference]: Start difference. First operand has 384 places, 484 transitions, 5340 flow. Second operand 9 states and 166 transitions. [2024-06-03 19:11:07,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 504 transitions, 6858 flow [2024-06-03 19:11:11,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 504 transitions, 6665 flow, removed 71 selfloop flow, removed 6 redundant places. [2024-06-03 19:11:11,354 INFO L231 Difference]: Finished difference. Result has 387 places, 490 transitions, 5481 flow [2024-06-03 19:11:11,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5147, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5481, PETRI_PLACES=387, PETRI_TRANSITIONS=490} [2024-06-03 19:11:11,356 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 343 predicate places. [2024-06-03 19:11:11,356 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 490 transitions, 5481 flow [2024-06-03 19:11:11,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:11:11,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:11:11,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:11:11,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-03 19:11:11,359 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:11:11,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:11:11,359 INFO L85 PathProgramCache]: Analyzing trace with hash 468660933, now seen corresponding path program 6 times [2024-06-03 19:11:11,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:11:11,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535786805] [2024-06-03 19:11:11,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:11:11,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:11:11,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:11:12,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:11:12,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:11:12,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535786805] [2024-06-03 19:11:12,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535786805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:11:12,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:11:12,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:11:12,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389495935] [2024-06-03 19:11:12,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:11:12,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:11:12,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:11:12,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:11:12,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:11:12,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:11:12,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 490 transitions, 5481 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:11:12,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:11:12,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:11:12,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:11:14,842 INFO L124 PetriNetUnfolderBase]: 3357/5588 cut-off events. [2024-06-03 19:11:14,842 INFO L125 PetriNetUnfolderBase]: For 1374843/1374849 co-relation queries the response was YES. [2024-06-03 19:11:14,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62455 conditions, 5588 events. 3357/5588 cut-off events. For 1374843/1374849 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 36104 event pairs, 703 based on Foata normal form. 4/5591 useless extension candidates. Maximal degree in co-relation 62270. Up to 5045 conditions per place. [2024-06-03 19:11:15,009 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 439 selfloop transitions, 43 changer transitions 0/510 dead transitions. [2024-06-03 19:11:15,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 510 transitions, 7025 flow [2024-06-03 19:11:15,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:11:15,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:11:15,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-03 19:11:15,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-03 19:11:15,011 INFO L175 Difference]: Start difference. First operand has 387 places, 490 transitions, 5481 flow. Second operand 9 states and 166 transitions. [2024-06-03 19:11:15,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 510 transitions, 7025 flow [2024-06-03 19:11:19,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 510 transitions, 6783 flow, removed 103 selfloop flow, removed 5 redundant places. [2024-06-03 19:11:19,649 INFO L231 Difference]: Finished difference. Result has 391 places, 496 transitions, 5589 flow [2024-06-03 19:11:19,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5239, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5589, PETRI_PLACES=391, PETRI_TRANSITIONS=496} [2024-06-03 19:11:19,650 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 347 predicate places. [2024-06-03 19:11:19,650 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 496 transitions, 5589 flow [2024-06-03 19:11:19,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:11:19,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:11:19,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:11:19,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-03 19:11:19,651 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:11:19,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:11:19,651 INFO L85 PathProgramCache]: Analyzing trace with hash 887187285, now seen corresponding path program 2 times [2024-06-03 19:11:19,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:11:19,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072465111] [2024-06-03 19:11:19,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:11:19,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:11:19,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:11:21,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:11:21,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:11:21,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072465111] [2024-06-03 19:11:21,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072465111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:11:21,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:11:21,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:11:21,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476873722] [2024-06-03 19:11:21,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:11:21,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:11:21,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:11:21,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:11:21,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:11:21,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:11:21,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 496 transitions, 5589 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:11:21,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:11:21,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:11:21,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:11:22,834 INFO L124 PetriNetUnfolderBase]: 3497/5737 cut-off events. [2024-06-03 19:11:22,835 INFO L125 PetriNetUnfolderBase]: For 1384423/1384425 co-relation queries the response was YES. [2024-06-03 19:11:22,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64007 conditions, 5737 events. 3497/5737 cut-off events. For 1384423/1384425 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 36434 event pairs, 741 based on Foata normal form. 3/5739 useless extension candidates. Maximal degree in co-relation 63820. Up to 5348 conditions per place. [2024-06-03 19:11:22,929 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 465 selfloop transitions, 43 changer transitions 0/513 dead transitions. [2024-06-03 19:11:22,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 513 transitions, 6743 flow [2024-06-03 19:11:22,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:11:22,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:11:22,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-03 19:11:22,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-03 19:11:22,931 INFO L175 Difference]: Start difference. First operand has 391 places, 496 transitions, 5589 flow. Second operand 9 states and 153 transitions. [2024-06-03 19:11:22,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 513 transitions, 6743 flow [2024-06-03 19:11:26,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 513 transitions, 6562 flow, removed 74 selfloop flow, removed 5 redundant places. [2024-06-03 19:11:26,950 INFO L231 Difference]: Finished difference. Result has 395 places, 502 transitions, 5616 flow [2024-06-03 19:11:26,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5408, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5616, PETRI_PLACES=395, PETRI_TRANSITIONS=502} [2024-06-03 19:11:26,952 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 351 predicate places. [2024-06-03 19:11:26,952 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 502 transitions, 5616 flow [2024-06-03 19:11:26,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:11:26,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:11:26,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:11:26,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-03 19:11:26,968 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:11:26,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:11:26,969 INFO L85 PathProgramCache]: Analyzing trace with hash 887179349, now seen corresponding path program 7 times [2024-06-03 19:11:26,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:11:26,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22038732] [2024-06-03 19:11:26,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:11:26,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:11:26,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:11:28,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:11:28,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:11:28,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22038732] [2024-06-03 19:11:28,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22038732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:11:28,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:11:28,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:11:28,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652438516] [2024-06-03 19:11:28,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:11:28,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:11:28,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:11:28,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:11:28,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:11:29,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:11:29,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 502 transitions, 5616 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:11:29,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:11:29,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:11:29,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:11:30,666 INFO L124 PetriNetUnfolderBase]: 3353/5582 cut-off events. [2024-06-03 19:11:30,666 INFO L125 PetriNetUnfolderBase]: For 1391023/1391029 co-relation queries the response was YES. [2024-06-03 19:11:30,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62516 conditions, 5582 events. 3353/5582 cut-off events. For 1391023/1391029 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 35995 event pairs, 703 based on Foata normal form. 3/5584 useless extension candidates. Maximal degree in co-relation 62327. Up to 4988 conditions per place. [2024-06-03 19:11:30,766 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 413 selfloop transitions, 79 changer transitions 0/520 dead transitions. [2024-06-03 19:11:30,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 520 transitions, 6824 flow [2024-06-03 19:11:30,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:11:30,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:11:30,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-03 19:11:30,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40930232558139534 [2024-06-03 19:11:30,768 INFO L175 Difference]: Start difference. First operand has 395 places, 502 transitions, 5616 flow. Second operand 10 states and 176 transitions. [2024-06-03 19:11:30,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 520 transitions, 6824 flow [2024-06-03 19:11:34,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 520 transitions, 6668 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-03 19:11:34,764 INFO L231 Difference]: Finished difference. Result has 400 places, 508 transitions, 5812 flow [2024-06-03 19:11:34,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5460, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5812, PETRI_PLACES=400, PETRI_TRANSITIONS=508} [2024-06-03 19:11:34,764 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 356 predicate places. [2024-06-03 19:11:34,764 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 508 transitions, 5812 flow [2024-06-03 19:11:34,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:11:34,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:11:34,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:11:34,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-03 19:11:34,765 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:11:34,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:11:34,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1987930477, now seen corresponding path program 3 times [2024-06-03 19:11:34,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:11:34,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360313322] [2024-06-03 19:11:34,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:11:34,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:11:34,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:11:36,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:11:36,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:11:36,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360313322] [2024-06-03 19:11:36,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360313322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:11:36,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:11:36,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:11:36,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629804727] [2024-06-03 19:11:36,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:11:36,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:11:36,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:11:36,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:11:36,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:11:36,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:11:36,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 508 transitions, 5812 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:11:36,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:11:36,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:11:36,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:11:38,007 INFO L124 PetriNetUnfolderBase]: 3496/5734 cut-off events. [2024-06-03 19:11:38,007 INFO L125 PetriNetUnfolderBase]: For 1412531/1412533 co-relation queries the response was YES. [2024-06-03 19:11:38,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64440 conditions, 5734 events. 3496/5734 cut-off events. For 1412531/1412533 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 36343 event pairs, 743 based on Foata normal form. 3/5736 useless extension candidates. Maximal degree in co-relation 64249. Up to 5331 conditions per place. [2024-06-03 19:11:38,107 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 459 selfloop transitions, 59 changer transitions 0/523 dead transitions. [2024-06-03 19:11:38,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 523 transitions, 7228 flow [2024-06-03 19:11:38,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:11:38,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:11:38,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-03 19:11:38,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979328165374677 [2024-06-03 19:11:38,108 INFO L175 Difference]: Start difference. First operand has 400 places, 508 transitions, 5812 flow. Second operand 9 states and 154 transitions. [2024-06-03 19:11:38,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 523 transitions, 7228 flow [2024-06-03 19:11:42,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 523 transitions, 6988 flow, removed 77 selfloop flow, removed 6 redundant places. [2024-06-03 19:11:42,696 INFO L231 Difference]: Finished difference. Result has 403 places, 511 transitions, 5786 flow [2024-06-03 19:11:42,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5572, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5786, PETRI_PLACES=403, PETRI_TRANSITIONS=511} [2024-06-03 19:11:42,711 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 359 predicate places. [2024-06-03 19:11:42,712 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 511 transitions, 5786 flow [2024-06-03 19:11:42,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:11:42,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:11:42,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:11:42,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-03 19:11:42,712 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:11:42,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:11:42,713 INFO L85 PathProgramCache]: Analyzing trace with hash 887446755, now seen corresponding path program 4 times [2024-06-03 19:11:42,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:11:42,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390409091] [2024-06-03 19:11:42,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:11:42,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:11:42,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:11:44,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:11:44,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:11:44,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390409091] [2024-06-03 19:11:44,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390409091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:11:44,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:11:44,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:11:44,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775681382] [2024-06-03 19:11:44,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:11:44,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:11:44,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:11:44,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:11:44,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:11:44,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:11:44,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 511 transitions, 5786 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:11:44,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:11:44,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:11:44,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:11:46,207 INFO L124 PetriNetUnfolderBase]: 3491/5727 cut-off events. [2024-06-03 19:11:46,207 INFO L125 PetriNetUnfolderBase]: For 1420242/1420244 co-relation queries the response was YES. [2024-06-03 19:11:46,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64232 conditions, 5727 events. 3491/5727 cut-off events. For 1420242/1420244 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 36322 event pairs, 747 based on Foata normal form. 3/5729 useless extension candidates. Maximal degree in co-relation 64039. Up to 5340 conditions per place. [2024-06-03 19:11:46,340 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 472 selfloop transitions, 45 changer transitions 0/522 dead transitions. [2024-06-03 19:11:46,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 522 transitions, 6848 flow [2024-06-03 19:11:46,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:11:46,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:11:46,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-03 19:11:46,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39276485788113696 [2024-06-03 19:11:46,342 INFO L175 Difference]: Start difference. First operand has 403 places, 511 transitions, 5786 flow. Second operand 9 states and 152 transitions. [2024-06-03 19:11:46,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 522 transitions, 6848 flow [2024-06-03 19:11:50,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 522 transitions, 6502 flow, removed 85 selfloop flow, removed 8 redundant places. [2024-06-03 19:11:50,833 INFO L231 Difference]: Finished difference. Result has 404 places, 511 transitions, 5536 flow [2024-06-03 19:11:50,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5440, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5536, PETRI_PLACES=404, PETRI_TRANSITIONS=511} [2024-06-03 19:11:50,834 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 360 predicate places. [2024-06-03 19:11:50,834 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 511 transitions, 5536 flow [2024-06-03 19:11:50,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:11:50,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:11:50,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:11:50,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-03 19:11:50,834 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:11:50,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:11:50,835 INFO L85 PathProgramCache]: Analyzing trace with hash 682852202, now seen corresponding path program 1 times [2024-06-03 19:11:50,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:11:50,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032252839] [2024-06-03 19:11:50,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:11:50,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:11:50,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:11:51,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:11:51,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:11:51,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032252839] [2024-06-03 19:11:51,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032252839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:11:51,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:11:51,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:11:51,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320912139] [2024-06-03 19:11:51,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:11:51,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:11:51,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:11:51,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:11:51,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:11:52,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:11:52,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 511 transitions, 5536 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:11:52,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:11:52,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:11:52,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:11:53,602 INFO L124 PetriNetUnfolderBase]: 3501/5743 cut-off events. [2024-06-03 19:11:53,603 INFO L125 PetriNetUnfolderBase]: For 1449242/1449246 co-relation queries the response was YES. [2024-06-03 19:11:53,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64360 conditions, 5743 events. 3501/5743 cut-off events. For 1449242/1449246 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 36412 event pairs, 729 based on Foata normal form. 6/5748 useless extension candidates. Maximal degree in co-relation 64169. Up to 5308 conditions per place. [2024-06-03 19:11:53,698 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 505 selfloop transitions, 34 changer transitions 0/544 dead transitions. [2024-06-03 19:11:53,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 544 transitions, 6884 flow [2024-06-03 19:11:53,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:11:53,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:11:53,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-03 19:11:53,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-03 19:11:53,700 INFO L175 Difference]: Start difference. First operand has 404 places, 511 transitions, 5536 flow. Second operand 9 states and 167 transitions. [2024-06-03 19:11:53,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 544 transitions, 6884 flow [2024-06-03 19:11:57,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 544 transitions, 6776 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-03 19:11:57,757 INFO L231 Difference]: Finished difference. Result has 407 places, 515 transitions, 5675 flow [2024-06-03 19:11:57,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5428, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5675, PETRI_PLACES=407, PETRI_TRANSITIONS=515} [2024-06-03 19:11:57,757 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 363 predicate places. [2024-06-03 19:11:57,757 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 515 transitions, 5675 flow [2024-06-03 19:11:57,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:11:57,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:11:57,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:11:57,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-03 19:11:57,758 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:11:57,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:11:57,758 INFO L85 PathProgramCache]: Analyzing trace with hash -21653361, now seen corresponding path program 1 times [2024-06-03 19:11:57,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:11:57,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421055149] [2024-06-03 19:11:57,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:11:57,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:11:57,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:11:58,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:11:58,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:11:58,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421055149] [2024-06-03 19:11:58,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421055149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:11:58,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:11:58,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:11:58,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933627255] [2024-06-03 19:11:58,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:11:58,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:11:58,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:11:58,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:11:58,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:11:58,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:11:58,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 515 transitions, 5675 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:11:58,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:11:58,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:11:58,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:12:00,326 INFO L124 PetriNetUnfolderBase]: 3506/5750 cut-off events. [2024-06-03 19:12:00,326 INFO L125 PetriNetUnfolderBase]: For 1470630/1470634 co-relation queries the response was YES. [2024-06-03 19:12:00,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65216 conditions, 5750 events. 3506/5750 cut-off events. For 1470630/1470634 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 36474 event pairs, 728 based on Foata normal form. 5/5754 useless extension candidates. Maximal degree in co-relation 65023. Up to 5327 conditions per place. [2024-06-03 19:12:00,424 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 504 selfloop transitions, 34 changer transitions 0/543 dead transitions. [2024-06-03 19:12:00,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 543 transitions, 6941 flow [2024-06-03 19:12:00,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:12:00,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:12:00,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-03 19:12:00,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-03 19:12:00,426 INFO L175 Difference]: Start difference. First operand has 407 places, 515 transitions, 5675 flow. Second operand 9 states and 163 transitions. [2024-06-03 19:12:00,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 543 transitions, 6941 flow [2024-06-03 19:12:05,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 543 transitions, 6742 flow, removed 70 selfloop flow, removed 6 redundant places. [2024-06-03 19:12:05,061 INFO L231 Difference]: Finished difference. Result has 410 places, 518 transitions, 5670 flow [2024-06-03 19:12:05,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5476, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5670, PETRI_PLACES=410, PETRI_TRANSITIONS=518} [2024-06-03 19:12:05,062 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 366 predicate places. [2024-06-03 19:12:05,062 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 518 transitions, 5670 flow [2024-06-03 19:12:05,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:05,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:12:05,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:12:05,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-03 19:12:05,063 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:12:05,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:12:05,063 INFO L85 PathProgramCache]: Analyzing trace with hash -700302264, now seen corresponding path program 2 times [2024-06-03 19:12:05,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:12:05,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700835800] [2024-06-03 19:12:05,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:12:05,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:12:05,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:12:05,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:12:05,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:12:05,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700835800] [2024-06-03 19:12:05,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700835800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:12:05,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:12:05,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:12:05,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473995846] [2024-06-03 19:12:05,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:12:05,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:12:05,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:12:05,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:12:05,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:12:06,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:12:06,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 518 transitions, 5670 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:06,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:12:06,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:12:06,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:12:07,571 INFO L124 PetriNetUnfolderBase]: 3516/5764 cut-off events. [2024-06-03 19:12:07,571 INFO L125 PetriNetUnfolderBase]: For 1504983/1504987 co-relation queries the response was YES. [2024-06-03 19:12:07,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65828 conditions, 5764 events. 3516/5764 cut-off events. For 1504983/1504987 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 36552 event pairs, 728 based on Foata normal form. 6/5769 useless extension candidates. Maximal degree in co-relation 65634. Up to 5318 conditions per place. [2024-06-03 19:12:07,673 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 505 selfloop transitions, 38 changer transitions 0/548 dead transitions. [2024-06-03 19:12:07,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 548 transitions, 7040 flow [2024-06-03 19:12:07,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:12:07,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:12:07,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-03 19:12:07,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-03 19:12:07,674 INFO L175 Difference]: Start difference. First operand has 410 places, 518 transitions, 5670 flow. Second operand 9 states and 167 transitions. [2024-06-03 19:12:07,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 548 transitions, 7040 flow [2024-06-03 19:12:12,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 548 transitions, 6868 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-03 19:12:12,222 INFO L231 Difference]: Finished difference. Result has 412 places, 521 transitions, 5746 flow [2024-06-03 19:12:12,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5498, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5746, PETRI_PLACES=412, PETRI_TRANSITIONS=521} [2024-06-03 19:12:12,223 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 368 predicate places. [2024-06-03 19:12:12,223 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 521 transitions, 5746 flow [2024-06-03 19:12:12,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:12,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:12:12,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:12:12,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-03 19:12:12,223 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:12:12,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:12:12,224 INFO L85 PathProgramCache]: Analyzing trace with hash 944174595, now seen corresponding path program 2 times [2024-06-03 19:12:12,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:12:12,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884556855] [2024-06-03 19:12:12,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:12:12,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:12:12,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:12:13,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:12:13,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:12:13,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884556855] [2024-06-03 19:12:13,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884556855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:12:13,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:12:13,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:12:13,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023524540] [2024-06-03 19:12:13,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:12:13,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:12:13,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:12:13,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:12:13,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:12:13,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:12:13,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 521 transitions, 5746 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:13,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:12:13,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:12:13,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:12:15,076 INFO L124 PetriNetUnfolderBase]: 3521/5771 cut-off events. [2024-06-03 19:12:15,076 INFO L125 PetriNetUnfolderBase]: For 1526860/1526864 co-relation queries the response was YES. [2024-06-03 19:12:15,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66553 conditions, 5771 events. 3521/5771 cut-off events. For 1526860/1526864 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 36569 event pairs, 728 based on Foata normal form. 5/5775 useless extension candidates. Maximal degree in co-relation 66358. Up to 5338 conditions per place. [2024-06-03 19:12:15,178 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 505 selfloop transitions, 40 changer transitions 0/550 dead transitions. [2024-06-03 19:12:15,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 550 transitions, 7036 flow [2024-06-03 19:12:15,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:12:15,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:12:15,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-03 19:12:15,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.413953488372093 [2024-06-03 19:12:15,180 INFO L175 Difference]: Start difference. First operand has 412 places, 521 transitions, 5746 flow. Second operand 10 states and 178 transitions. [2024-06-03 19:12:15,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 550 transitions, 7036 flow [2024-06-03 19:12:20,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 550 transitions, 6818 flow, removed 73 selfloop flow, removed 7 redundant places. [2024-06-03 19:12:20,251 INFO L231 Difference]: Finished difference. Result has 415 places, 524 transitions, 5742 flow [2024-06-03 19:12:20,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5528, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5742, PETRI_PLACES=415, PETRI_TRANSITIONS=524} [2024-06-03 19:12:20,251 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 371 predicate places. [2024-06-03 19:12:20,251 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 524 transitions, 5742 flow [2024-06-03 19:12:20,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:20,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:12:20,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:12:20,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-03 19:12:20,252 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:12:20,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:12:20,252 INFO L85 PathProgramCache]: Analyzing trace with hash 889655372, now seen corresponding path program 3 times [2024-06-03 19:12:20,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:12:20,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160164119] [2024-06-03 19:12:20,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:12:20,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:12:20,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:12:21,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:12:21,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:12:21,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160164119] [2024-06-03 19:12:21,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160164119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:12:21,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:12:21,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:12:21,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108575438] [2024-06-03 19:12:21,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:12:21,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:12:21,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:12:21,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:12:21,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:12:21,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:12:21,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 524 transitions, 5742 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:21,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:12:21,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:12:21,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:12:22,952 INFO L124 PetriNetUnfolderBase]: 3531/5789 cut-off events. [2024-06-03 19:12:22,952 INFO L125 PetriNetUnfolderBase]: For 1559462/1559466 co-relation queries the response was YES. [2024-06-03 19:12:23,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67170 conditions, 5789 events. 3531/5789 cut-off events. For 1559462/1559466 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 36747 event pairs, 728 based on Foata normal form. 6/5794 useless extension candidates. Maximal degree in co-relation 66974. Up to 5323 conditions per place. [2024-06-03 19:12:23,062 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 504 selfloop transitions, 46 changer transitions 0/555 dead transitions. [2024-06-03 19:12:23,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 555 transitions, 7136 flow [2024-06-03 19:12:23,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:12:23,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:12:23,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-03 19:12:23,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4232558139534884 [2024-06-03 19:12:23,064 INFO L175 Difference]: Start difference. First operand has 415 places, 524 transitions, 5742 flow. Second operand 10 states and 182 transitions. [2024-06-03 19:12:23,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 555 transitions, 7136 flow [2024-06-03 19:12:27,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 555 transitions, 6944 flow, removed 58 selfloop flow, removed 8 redundant places. [2024-06-03 19:12:27,261 INFO L231 Difference]: Finished difference. Result has 417 places, 527 transitions, 5822 flow [2024-06-03 19:12:27,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5550, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5822, PETRI_PLACES=417, PETRI_TRANSITIONS=527} [2024-06-03 19:12:27,262 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 373 predicate places. [2024-06-03 19:12:27,262 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 527 transitions, 5822 flow [2024-06-03 19:12:27,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:27,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:12:27,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:12:27,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-03 19:12:27,263 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:12:27,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:12:27,263 INFO L85 PathProgramCache]: Analyzing trace with hash -839747145, now seen corresponding path program 3 times [2024-06-03 19:12:27,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:12:27,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004463670] [2024-06-03 19:12:27,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:12:27,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:12:27,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:12:28,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:12:28,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:12:28,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004463670] [2024-06-03 19:12:28,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004463670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:12:28,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:12:28,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:12:28,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345996353] [2024-06-03 19:12:28,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:12:28,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:12:28,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:12:28,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:12:28,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:12:28,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:12:28,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 527 transitions, 5822 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:28,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:12:28,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:12:28,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:12:30,298 INFO L124 PetriNetUnfolderBase]: 3541/5805 cut-off events. [2024-06-03 19:12:30,298 INFO L125 PetriNetUnfolderBase]: For 1581344/1581348 co-relation queries the response was YES. [2024-06-03 19:12:30,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67939 conditions, 5805 events. 3541/5805 cut-off events. For 1581344/1581348 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 36916 event pairs, 728 based on Foata normal form. 5/5809 useless extension candidates. Maximal degree in co-relation 67742. Up to 5357 conditions per place. [2024-06-03 19:12:30,402 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 506 selfloop transitions, 48 changer transitions 0/559 dead transitions. [2024-06-03 19:12:30,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 559 transitions, 7161 flow [2024-06-03 19:12:30,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:12:30,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:12:30,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-03 19:12:30,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41627906976744183 [2024-06-03 19:12:30,403 INFO L175 Difference]: Start difference. First operand has 417 places, 527 transitions, 5822 flow. Second operand 10 states and 179 transitions. [2024-06-03 19:12:30,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 559 transitions, 7161 flow [2024-06-03 19:12:35,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 559 transitions, 6919 flow, removed 77 selfloop flow, removed 8 redundant places. [2024-06-03 19:12:35,612 INFO L231 Difference]: Finished difference. Result has 420 places, 533 transitions, 5859 flow [2024-06-03 19:12:35,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5580, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5859, PETRI_PLACES=420, PETRI_TRANSITIONS=533} [2024-06-03 19:12:35,612 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 376 predicate places. [2024-06-03 19:12:35,612 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 533 transitions, 5859 flow [2024-06-03 19:12:35,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:35,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:12:35,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:12:35,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-03 19:12:35,613 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:12:35,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:12:35,614 INFO L85 PathProgramCache]: Analyzing trace with hash 798787544, now seen corresponding path program 4 times [2024-06-03 19:12:35,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:12:35,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199800281] [2024-06-03 19:12:35,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:12:35,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:12:35,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:12:36,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:12:36,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:12:36,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199800281] [2024-06-03 19:12:36,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199800281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:12:36,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:12:36,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:12:36,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417183820] [2024-06-03 19:12:36,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:12:36,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:12:36,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:12:36,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:12:36,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:12:36,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:12:36,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 533 transitions, 5859 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:36,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:12:36,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:12:36,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:12:38,137 INFO L124 PetriNetUnfolderBase]: 3551/5823 cut-off events. [2024-06-03 19:12:38,137 INFO L125 PetriNetUnfolderBase]: For 1615115/1615117 co-relation queries the response was YES. [2024-06-03 19:12:38,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68577 conditions, 5823 events. 3551/5823 cut-off events. For 1615115/1615117 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 37051 event pairs, 740 based on Foata normal form. 4/5826 useless extension candidates. Maximal degree in co-relation 68378. Up to 5247 conditions per place. [2024-06-03 19:12:38,241 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 494 selfloop transitions, 64 changer transitions 0/563 dead transitions. [2024-06-03 19:12:38,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 563 transitions, 7259 flow [2024-06-03 19:12:38,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:12:38,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:12:38,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-03 19:12:38,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-03 19:12:38,243 INFO L175 Difference]: Start difference. First operand has 420 places, 533 transitions, 5859 flow. Second operand 9 states and 171 transitions. [2024-06-03 19:12:38,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 563 transitions, 7259 flow [2024-06-03 19:12:43,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 563 transitions, 7051 flow, removed 64 selfloop flow, removed 7 redundant places. [2024-06-03 19:12:43,938 INFO L231 Difference]: Finished difference. Result has 422 places, 537 transitions, 5977 flow [2024-06-03 19:12:43,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5651, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5977, PETRI_PLACES=422, PETRI_TRANSITIONS=537} [2024-06-03 19:12:43,939 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 378 predicate places. [2024-06-03 19:12:43,939 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 537 transitions, 5977 flow [2024-06-03 19:12:43,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:43,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:12:43,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:12:43,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-03 19:12:43,940 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:12:43,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:12:43,940 INFO L85 PathProgramCache]: Analyzing trace with hash 798996081, now seen corresponding path program 1 times [2024-06-03 19:12:43,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:12:43,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856750331] [2024-06-03 19:12:43,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:12:43,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:12:43,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:12:44,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:12:44,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:12:44,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856750331] [2024-06-03 19:12:44,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856750331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:12:44,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:12:44,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:12:44,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929428332] [2024-06-03 19:12:44,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:12:44,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:12:44,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:12:44,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:12:44,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:12:44,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:12:44,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 537 transitions, 5977 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:44,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:12:44,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:12:44,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:12:46,686 INFO L124 PetriNetUnfolderBase]: 3596/5896 cut-off events. [2024-06-03 19:12:46,686 INFO L125 PetriNetUnfolderBase]: For 1638048/1638050 co-relation queries the response was YES. [2024-06-03 19:12:46,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69825 conditions, 5896 events. 3596/5896 cut-off events. For 1638048/1638050 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 37556 event pairs, 752 based on Foata normal form. 1/5895 useless extension candidates. Maximal degree in co-relation 69625. Up to 5374 conditions per place. [2024-06-03 19:12:46,790 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 516 selfloop transitions, 56 changer transitions 0/577 dead transitions. [2024-06-03 19:12:46,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 577 transitions, 7499 flow [2024-06-03 19:12:46,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:12:46,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:12:46,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-03 19:12:46,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-03 19:12:46,791 INFO L175 Difference]: Start difference. First operand has 422 places, 537 transitions, 5977 flow. Second operand 10 states and 180 transitions. [2024-06-03 19:12:46,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 577 transitions, 7499 flow [2024-06-03 19:12:50,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 577 transitions, 7233 flow, removed 83 selfloop flow, removed 5 redundant places. [2024-06-03 19:12:50,595 INFO L231 Difference]: Finished difference. Result has 430 places, 552 transitions, 6175 flow [2024-06-03 19:12:50,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5721, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6175, PETRI_PLACES=430, PETRI_TRANSITIONS=552} [2024-06-03 19:12:50,596 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 386 predicate places. [2024-06-03 19:12:50,596 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 552 transitions, 6175 flow [2024-06-03 19:12:50,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:50,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:12:50,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:12:50,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-03 19:12:50,597 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:12:50,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:12:50,597 INFO L85 PathProgramCache]: Analyzing trace with hash -32398154, now seen corresponding path program 5 times [2024-06-03 19:12:50,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:12:50,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762426546] [2024-06-03 19:12:50,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:12:50,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:12:50,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:12:51,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:12:51,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:12:51,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762426546] [2024-06-03 19:12:51,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762426546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:12:51,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:12:51,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:12:51,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095179325] [2024-06-03 19:12:51,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:12:51,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:12:51,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:12:51,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:12:51,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:12:51,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:12:51,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 552 transitions, 6175 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:51,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:12:51,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:12:51,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:12:53,418 INFO L124 PetriNetUnfolderBase]: 3622/5934 cut-off events. [2024-06-03 19:12:53,418 INFO L125 PetriNetUnfolderBase]: For 1698715/1698717 co-relation queries the response was YES. [2024-06-03 19:12:53,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71349 conditions, 5934 events. 3622/5934 cut-off events. For 1698715/1698717 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 37791 event pairs, 740 based on Foata normal form. 4/5937 useless extension candidates. Maximal degree in co-relation 71145. Up to 5286 conditions per place. [2024-06-03 19:12:53,512 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 497 selfloop transitions, 81 changer transitions 0/583 dead transitions. [2024-06-03 19:12:53,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 583 transitions, 8097 flow [2024-06-03 19:12:53,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:12:53,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:12:53,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-03 19:12:53,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-03 19:12:53,513 INFO L175 Difference]: Start difference. First operand has 430 places, 552 transitions, 6175 flow. Second operand 9 states and 171 transitions. [2024-06-03 19:12:53,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 583 transitions, 8097 flow [2024-06-03 19:12:57,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 583 transitions, 7903 flow, removed 72 selfloop flow, removed 3 redundant places. [2024-06-03 19:12:57,856 INFO L231 Difference]: Finished difference. Result has 436 places, 558 transitions, 6527 flow [2024-06-03 19:12:57,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5981, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6527, PETRI_PLACES=436, PETRI_TRANSITIONS=558} [2024-06-03 19:12:57,856 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 392 predicate places. [2024-06-03 19:12:57,856 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 558 transitions, 6527 flow [2024-06-03 19:12:57,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:57,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:12:57,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:12:57,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-03 19:12:57,857 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:12:57,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:12:57,857 INFO L85 PathProgramCache]: Analyzing trace with hash -32397751, now seen corresponding path program 1 times [2024-06-03 19:12:57,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:12:57,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625264719] [2024-06-03 19:12:57,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:12:57,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:12:57,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:12:58,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:12:58,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:12:58,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625264719] [2024-06-03 19:12:58,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625264719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:12:58,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:12:58,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:12:58,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118932544] [2024-06-03 19:12:58,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:12:58,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:12:58,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:12:58,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:12:58,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:12:59,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:12:59,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 558 transitions, 6527 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:12:59,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:12:59,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:12:59,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:00,702 INFO L124 PetriNetUnfolderBase]: 3632/5950 cut-off events. [2024-06-03 19:13:00,703 INFO L125 PetriNetUnfolderBase]: For 1738443/1738445 co-relation queries the response was YES. [2024-06-03 19:13:00,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72252 conditions, 5950 events. 3632/5950 cut-off events. For 1738443/1738445 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 37936 event pairs, 735 based on Foata normal form. 4/5953 useless extension candidates. Maximal degree in co-relation 72047. Up to 5467 conditions per place. [2024-06-03 19:13:00,806 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 534 selfloop transitions, 47 changer transitions 0/586 dead transitions. [2024-06-03 19:13:00,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 586 transitions, 7919 flow [2024-06-03 19:13:00,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:13:00,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:13:00,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-03 19:13:00,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-03 19:13:00,808 INFO L175 Difference]: Start difference. First operand has 436 places, 558 transitions, 6527 flow. Second operand 9 states and 166 transitions. [2024-06-03 19:13:00,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 586 transitions, 7919 flow [2024-06-03 19:13:06,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 586 transitions, 7643 flow, removed 97 selfloop flow, removed 5 redundant places. [2024-06-03 19:13:06,336 INFO L231 Difference]: Finished difference. Result has 440 places, 562 transitions, 6496 flow [2024-06-03 19:13:06,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6251, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6496, PETRI_PLACES=440, PETRI_TRANSITIONS=562} [2024-06-03 19:13:06,336 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 396 predicate places. [2024-06-03 19:13:06,337 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 562 transitions, 6496 flow [2024-06-03 19:13:06,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:06,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:06,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:06,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-03 19:13:06,337 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:13:06,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:06,338 INFO L85 PathProgramCache]: Analyzing trace with hash -38088824, now seen corresponding path program 6 times [2024-06-03 19:13:06,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:06,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070099594] [2024-06-03 19:13:06,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:06,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:06,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:07,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:07,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:07,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070099594] [2024-06-03 19:13:07,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070099594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:07,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:07,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:13:07,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11359713] [2024-06-03 19:13:07,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:07,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:13:07,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:07,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:13:07,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:13:07,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:13:07,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 562 transitions, 6496 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:07,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:07,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:13:07,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:08,944 INFO L124 PetriNetUnfolderBase]: 3626/5940 cut-off events. [2024-06-03 19:13:08,944 INFO L125 PetriNetUnfolderBase]: For 1740869/1740871 co-relation queries the response was YES. [2024-06-03 19:13:09,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72390 conditions, 5940 events. 3626/5940 cut-off events. For 1740869/1740871 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 37882 event pairs, 740 based on Foata normal form. 4/5943 useless extension candidates. Maximal degree in co-relation 72183. Up to 5323 conditions per place. [2024-06-03 19:13:09,054 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 514 selfloop transitions, 69 changer transitions 0/588 dead transitions. [2024-06-03 19:13:09,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 588 transitions, 7762 flow [2024-06-03 19:13:09,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:13:09,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:13:09,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-03 19:13:09,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-03 19:13:09,055 INFO L175 Difference]: Start difference. First operand has 440 places, 562 transitions, 6496 flow. Second operand 9 states and 172 transitions. [2024-06-03 19:13:09,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 588 transitions, 7762 flow [2024-06-03 19:13:13,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 588 transitions, 7415 flow, removed 129 selfloop flow, removed 7 redundant places. [2024-06-03 19:13:13,721 INFO L231 Difference]: Finished difference. Result has 442 places, 562 transitions, 6293 flow [2024-06-03 19:13:13,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6149, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6293, PETRI_PLACES=442, PETRI_TRANSITIONS=562} [2024-06-03 19:13:13,721 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 398 predicate places. [2024-06-03 19:13:13,722 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 562 transitions, 6293 flow [2024-06-03 19:13:13,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:13,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:13,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:13,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-03 19:13:13,722 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:13:13,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:13,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1421243290, now seen corresponding path program 7 times [2024-06-03 19:13:13,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:13,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103458146] [2024-06-03 19:13:13,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:13,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:13,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:14,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:14,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:14,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103458146] [2024-06-03 19:13:14,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103458146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:14,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:14,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:13:14,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125253239] [2024-06-03 19:13:14,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:14,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:13:14,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:14,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:13:14,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:13:14,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:13:14,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 562 transitions, 6293 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:14,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:14,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:13:14,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:16,461 INFO L124 PetriNetUnfolderBase]: 3636/5958 cut-off events. [2024-06-03 19:13:16,461 INFO L125 PetriNetUnfolderBase]: For 1763233/1763235 co-relation queries the response was YES. [2024-06-03 19:13:16,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72614 conditions, 5958 events. 3636/5958 cut-off events. For 1763233/1763235 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 38011 event pairs, 740 based on Foata normal form. 4/5961 useless extension candidates. Maximal degree in co-relation 72406. Up to 5322 conditions per place. [2024-06-03 19:13:16,568 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 507 selfloop transitions, 77 changer transitions 0/589 dead transitions. [2024-06-03 19:13:16,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 589 transitions, 7771 flow [2024-06-03 19:13:16,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:13:16,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:13:16,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-03 19:13:16,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-03 19:13:16,569 INFO L175 Difference]: Start difference. First operand has 442 places, 562 transitions, 6293 flow. Second operand 9 states and 171 transitions. [2024-06-03 19:13:16,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 589 transitions, 7771 flow [2024-06-03 19:13:20,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 589 transitions, 7570 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-03 19:13:20,765 INFO L231 Difference]: Finished difference. Result has 441 places, 565 transitions, 6452 flow [2024-06-03 19:13:20,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6092, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6452, PETRI_PLACES=441, PETRI_TRANSITIONS=565} [2024-06-03 19:13:20,765 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 397 predicate places. [2024-06-03 19:13:20,765 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 565 transitions, 6452 flow [2024-06-03 19:13:20,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:20,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:20,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:20,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-03 19:13:20,766 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:13:20,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:20,766 INFO L85 PathProgramCache]: Analyzing trace with hash 793575111, now seen corresponding path program 4 times [2024-06-03 19:13:20,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:20,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429523105] [2024-06-03 19:13:20,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:20,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:20,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:21,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:21,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:21,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429523105] [2024-06-03 19:13:21,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429523105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:21,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:21,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:13:21,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533329523] [2024-06-03 19:13:21,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:21,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:13:21,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:21,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:13:21,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:13:21,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:13:21,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 565 transitions, 6452 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:21,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:21,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:13:21,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:23,589 INFO L124 PetriNetUnfolderBase]: 3641/5966 cut-off events. [2024-06-03 19:13:23,590 INFO L125 PetriNetUnfolderBase]: For 1788789/1788791 co-relation queries the response was YES. [2024-06-03 19:13:23,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73365 conditions, 5966 events. 3641/5966 cut-off events. For 1788789/1788791 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 38099 event pairs, 736 based on Foata normal form. 3/5968 useless extension candidates. Maximal degree in co-relation 73158. Up to 5453 conditions per place. [2024-06-03 19:13:23,698 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 536 selfloop transitions, 49 changer transitions 0/590 dead transitions. [2024-06-03 19:13:23,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 590 transitions, 7830 flow [2024-06-03 19:13:23,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:13:23,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:13:23,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-03 19:13:23,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-03 19:13:23,700 INFO L175 Difference]: Start difference. First operand has 441 places, 565 transitions, 6452 flow. Second operand 9 states and 164 transitions. [2024-06-03 19:13:23,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 590 transitions, 7830 flow [2024-06-03 19:13:29,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 590 transitions, 7502 flow, removed 89 selfloop flow, removed 7 redundant places. [2024-06-03 19:13:29,772 INFO L231 Difference]: Finished difference. Result has 443 places, 568 transitions, 6378 flow [2024-06-03 19:13:29,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6124, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6378, PETRI_PLACES=443, PETRI_TRANSITIONS=568} [2024-06-03 19:13:29,772 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 399 predicate places. [2024-06-03 19:13:29,772 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 568 transitions, 6378 flow [2024-06-03 19:13:29,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:29,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:29,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:29,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-03 19:13:29,773 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:13:29,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:29,774 INFO L85 PathProgramCache]: Analyzing trace with hash 803757464, now seen corresponding path program 8 times [2024-06-03 19:13:29,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:29,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112979561] [2024-06-03 19:13:29,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:29,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:29,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:30,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:30,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:30,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112979561] [2024-06-03 19:13:30,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112979561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:30,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:30,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:13:30,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087793781] [2024-06-03 19:13:30,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:30,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:13:30,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:30,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:13:30,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:13:30,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:13:30,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 568 transitions, 6378 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:30,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:30,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:13:30,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:32,494 INFO L124 PetriNetUnfolderBase]: 3667/6007 cut-off events. [2024-06-03 19:13:32,495 INFO L125 PetriNetUnfolderBase]: For 1851258/1851260 co-relation queries the response was YES. [2024-06-03 19:13:32,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74750 conditions, 6007 events. 3667/6007 cut-off events. For 1851258/1851260 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 38370 event pairs, 741 based on Foata normal form. 4/6010 useless extension candidates. Maximal degree in co-relation 74542. Up to 5301 conditions per place. [2024-06-03 19:13:32,608 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 491 selfloop transitions, 101 changer transitions 0/597 dead transitions. [2024-06-03 19:13:32,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 597 transitions, 8390 flow [2024-06-03 19:13:32,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:13:32,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:13:32,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-03 19:13:32,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-03 19:13:32,610 INFO L175 Difference]: Start difference. First operand has 443 places, 568 transitions, 6378 flow. Second operand 9 states and 171 transitions. [2024-06-03 19:13:32,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 597 transitions, 8390 flow [2024-06-03 19:13:37,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 597 transitions, 8158 flow, removed 69 selfloop flow, removed 7 redundant places. [2024-06-03 19:13:37,758 INFO L231 Difference]: Finished difference. Result has 445 places, 574 transitions, 6764 flow [2024-06-03 19:13:37,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6146, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6764, PETRI_PLACES=445, PETRI_TRANSITIONS=574} [2024-06-03 19:13:37,758 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 401 predicate places. [2024-06-03 19:13:37,758 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 574 transitions, 6764 flow [2024-06-03 19:13:37,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:37,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:37,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:37,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-03 19:13:37,759 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:13:37,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:37,760 INFO L85 PathProgramCache]: Analyzing trace with hash 803757867, now seen corresponding path program 2 times [2024-06-03 19:13:37,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:37,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137400493] [2024-06-03 19:13:37,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:37,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:37,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:38,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:38,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:38,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137400493] [2024-06-03 19:13:38,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137400493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:38,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:38,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:13:38,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129280478] [2024-06-03 19:13:38,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:38,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:13:38,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:38,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:13:38,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:13:38,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:13:38,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 574 transitions, 6764 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:38,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:38,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:13:38,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:40,818 INFO L124 PetriNetUnfolderBase]: 3677/6023 cut-off events. [2024-06-03 19:13:40,818 INFO L125 PetriNetUnfolderBase]: For 1889069/1889071 co-relation queries the response was YES. [2024-06-03 19:13:40,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75700 conditions, 6023 events. 3677/6023 cut-off events. For 1889069/1889071 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 38493 event pairs, 735 based on Foata normal form. 4/6026 useless extension candidates. Maximal degree in co-relation 75491. Up to 5519 conditions per place. [2024-06-03 19:13:40,924 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 544 selfloop transitions, 51 changer transitions 0/600 dead transitions. [2024-06-03 19:13:40,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 600 transitions, 8216 flow [2024-06-03 19:13:40,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:13:40,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:13:40,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-03 19:13:40,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-03 19:13:40,925 INFO L175 Difference]: Start difference. First operand has 445 places, 574 transitions, 6764 flow. Second operand 9 states and 166 transitions. [2024-06-03 19:13:40,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 600 transitions, 8216 flow [2024-06-03 19:13:45,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 600 transitions, 7828 flow, removed 111 selfloop flow, removed 6 redundant places. [2024-06-03 19:13:45,950 INFO L231 Difference]: Finished difference. Result has 448 places, 578 transitions, 6643 flow [2024-06-03 19:13:45,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6378, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6643, PETRI_PLACES=448, PETRI_TRANSITIONS=578} [2024-06-03 19:13:45,951 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 404 predicate places. [2024-06-03 19:13:45,951 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 578 transitions, 6643 flow [2024-06-03 19:13:45,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:45,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:45,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:45,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-03 19:13:45,952 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:13:45,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:45,952 INFO L85 PathProgramCache]: Analyzing trace with hash -27749611, now seen corresponding path program 3 times [2024-06-03 19:13:45,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:45,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834299053] [2024-06-03 19:13:45,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:45,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:45,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:47,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:47,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:47,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834299053] [2024-06-03 19:13:47,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834299053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:47,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:47,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:13:47,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108243928] [2024-06-03 19:13:47,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:47,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:13:47,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:47,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:13:47,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:13:47,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:13:47,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 578 transitions, 6643 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:47,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:47,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:13:47,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:49,054 INFO L124 PetriNetUnfolderBase]: 3682/6030 cut-off events. [2024-06-03 19:13:49,055 INFO L125 PetriNetUnfolderBase]: For 1886926/1886928 co-relation queries the response was YES. [2024-06-03 19:13:49,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75632 conditions, 6030 events. 3682/6030 cut-off events. For 1886926/1886928 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 38458 event pairs, 735 based on Foata normal form. 3/6032 useless extension candidates. Maximal degree in co-relation 75422. Up to 5514 conditions per place. [2024-06-03 19:13:49,165 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 537 selfloop transitions, 60 changer transitions 0/602 dead transitions. [2024-06-03 19:13:49,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 602 transitions, 8015 flow [2024-06-03 19:13:49,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:13:49,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:13:49,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-03 19:13:49,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-03 19:13:49,166 INFO L175 Difference]: Start difference. First operand has 448 places, 578 transitions, 6643 flow. Second operand 9 states and 166 transitions. [2024-06-03 19:13:49,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 602 transitions, 8015 flow [2024-06-03 19:13:54,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 602 transitions, 7778 flow, removed 70 selfloop flow, removed 7 redundant places. [2024-06-03 19:13:54,343 INFO L231 Difference]: Finished difference. Result has 450 places, 581 transitions, 6628 flow [2024-06-03 19:13:54,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6406, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6628, PETRI_PLACES=450, PETRI_TRANSITIONS=581} [2024-06-03 19:13:54,344 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 406 predicate places. [2024-06-03 19:13:54,344 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 581 transitions, 6628 flow [2024-06-03 19:13:54,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:54,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:13:54,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:13:54,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-03 19:13:54,344 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:13:54,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:13:54,345 INFO L85 PathProgramCache]: Analyzing trace with hash -27749797, now seen corresponding path program 5 times [2024-06-03 19:13:54,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:13:54,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720109236] [2024-06-03 19:13:54,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:13:54,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:13:54,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:13:55,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:13:55,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:13:55,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720109236] [2024-06-03 19:13:55,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720109236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:13:55,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:13:55,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:13:55,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043404269] [2024-06-03 19:13:55,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:13:55,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:13:55,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:13:55,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:13:55,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:13:55,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:13:55,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 581 transitions, 6628 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:13:55,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:13:55,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:13:55,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:13:57,210 INFO L124 PetriNetUnfolderBase]: 3695/6045 cut-off events. [2024-06-03 19:13:57,210 INFO L125 PetriNetUnfolderBase]: For 1923942/1923944 co-relation queries the response was YES. [2024-06-03 19:13:57,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76605 conditions, 6045 events. 3695/6045 cut-off events. For 1923942/1923944 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 38558 event pairs, 739 based on Foata normal form. 3/6047 useless extension candidates. Maximal degree in co-relation 76394. Up to 5502 conditions per place. [2024-06-03 19:13:57,322 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 535 selfloop transitions, 67 changer transitions 0/607 dead transitions. [2024-06-03 19:13:57,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 607 transitions, 8492 flow [2024-06-03 19:13:57,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:13:57,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:13:57,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-03 19:13:57,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-03 19:13:57,324 INFO L175 Difference]: Start difference. First operand has 450 places, 581 transitions, 6628 flow. Second operand 9 states and 164 transitions. [2024-06-03 19:13:57,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 607 transitions, 8492 flow [2024-06-03 19:14:03,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 607 transitions, 8292 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-03 19:14:03,991 INFO L231 Difference]: Finished difference. Result has 452 places, 587 transitions, 6882 flow [2024-06-03 19:14:03,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6428, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6882, PETRI_PLACES=452, PETRI_TRANSITIONS=587} [2024-06-03 19:14:04,008 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 408 predicate places. [2024-06-03 19:14:04,008 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 587 transitions, 6882 flow [2024-06-03 19:14:04,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:04,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:14:04,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:14:04,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-03 19:14:04,009 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:14:04,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:14:04,009 INFO L85 PathProgramCache]: Analyzing trace with hash -27762104, now seen corresponding path program 9 times [2024-06-03 19:14:04,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:14:04,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504886694] [2024-06-03 19:14:04,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:14:04,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:14:04,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:14:05,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:14:05,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:14:05,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504886694] [2024-06-03 19:14:05,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504886694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:14:05,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:14:05,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:14:05,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559410323] [2024-06-03 19:14:05,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:14:05,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:14:05,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:14:05,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:14:05,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:14:05,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:14:05,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 587 transitions, 6882 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:05,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:14:05,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:14:05,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:14:06,893 INFO L124 PetriNetUnfolderBase]: 3689/6038 cut-off events. [2024-06-03 19:14:06,893 INFO L125 PetriNetUnfolderBase]: For 1943396/1943398 co-relation queries the response was YES. [2024-06-03 19:14:06,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76605 conditions, 6038 events. 3689/6038 cut-off events. For 1943396/1943398 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 38565 event pairs, 738 based on Foata normal form. 4/6041 useless extension candidates. Maximal degree in co-relation 76393. Up to 5335 conditions per place. [2024-06-03 19:14:07,010 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 504 selfloop transitions, 100 changer transitions 0/609 dead transitions. [2024-06-03 19:14:07,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 609 transitions, 8234 flow [2024-06-03 19:14:07,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:14:07,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:14:07,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-03 19:14:07,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-03 19:14:07,011 INFO L175 Difference]: Start difference. First operand has 452 places, 587 transitions, 6882 flow. Second operand 9 states and 170 transitions. [2024-06-03 19:14:07,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 609 transitions, 8234 flow [2024-06-03 19:14:12,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 609 transitions, 7859 flow, removed 154 selfloop flow, removed 5 redundant places. [2024-06-03 19:14:12,809 INFO L231 Difference]: Finished difference. Result has 456 places, 587 transitions, 6713 flow [2024-06-03 19:14:12,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6507, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6713, PETRI_PLACES=456, PETRI_TRANSITIONS=587} [2024-06-03 19:14:12,809 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 412 predicate places. [2024-06-03 19:14:12,809 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 587 transitions, 6713 flow [2024-06-03 19:14:12,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:12,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:14:12,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:14:12,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-03 19:14:12,810 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:14:12,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:14:12,810 INFO L85 PathProgramCache]: Analyzing trace with hash -731728575, now seen corresponding path program 6 times [2024-06-03 19:14:12,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:14:12,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631739927] [2024-06-03 19:14:12,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:14:12,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:14:12,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:14:13,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:14:13,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:14:13,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631739927] [2024-06-03 19:14:13,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631739927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:14:13,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:14:13,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:14:13,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350299409] [2024-06-03 19:14:13,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:14:13,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:14:13,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:14:13,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:14:13,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:14:14,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:14:14,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 587 transitions, 6713 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:14,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:14:14,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:14:14,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:14:15,756 INFO L124 PetriNetUnfolderBase]: 3686/6033 cut-off events. [2024-06-03 19:14:15,757 INFO L125 PetriNetUnfolderBase]: For 1938194/1938196 co-relation queries the response was YES. [2024-06-03 19:14:15,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76409 conditions, 6033 events. 3686/6033 cut-off events. For 1938194/1938196 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 38498 event pairs, 738 based on Foata normal form. 3/6035 useless extension candidates. Maximal degree in co-relation 76195. Up to 5503 conditions per place. [2024-06-03 19:14:15,867 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 545 selfloop transitions, 56 changer transitions 0/606 dead transitions. [2024-06-03 19:14:15,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 606 transitions, 7969 flow [2024-06-03 19:14:15,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:14:15,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:14:15,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-03 19:14:15,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-03 19:14:15,868 INFO L175 Difference]: Start difference. First operand has 456 places, 587 transitions, 6713 flow. Second operand 9 states and 162 transitions. [2024-06-03 19:14:15,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 606 transitions, 7969 flow [2024-06-03 19:14:21,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 606 transitions, 7631 flow, removed 63 selfloop flow, removed 8 redundant places. [2024-06-03 19:14:21,439 INFO L231 Difference]: Finished difference. Result has 457 places, 587 transitions, 6493 flow [2024-06-03 19:14:21,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6375, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6493, PETRI_PLACES=457, PETRI_TRANSITIONS=587} [2024-06-03 19:14:21,440 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 413 predicate places. [2024-06-03 19:14:21,440 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 587 transitions, 6493 flow [2024-06-03 19:14:21,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:21,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:14:21,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:14:21,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-03 19:14:21,440 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:14:21,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:14:21,441 INFO L85 PathProgramCache]: Analyzing trace with hash -896178143, now seen corresponding path program 1 times [2024-06-03 19:14:21,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:14:21,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420469345] [2024-06-03 19:14:21,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:14:21,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:14:21,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:14:22,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:14:22,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:14:22,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420469345] [2024-06-03 19:14:22,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420469345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:14:22,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:14:22,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:14:22,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708843012] [2024-06-03 19:14:22,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:14:22,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:14:22,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:14:22,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:14:22,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:14:22,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:14:22,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 587 transitions, 6493 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:22,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:14:22,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:14:22,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:14:24,532 INFO L124 PetriNetUnfolderBase]: 3691/6042 cut-off events. [2024-06-03 19:14:24,532 INFO L125 PetriNetUnfolderBase]: For 1943009/1943011 co-relation queries the response was YES. [2024-06-03 19:14:24,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76401 conditions, 6042 events. 3691/6042 cut-off events. For 1943009/1943011 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 38517 event pairs, 733 based on Foata normal form. 3/6044 useless extension candidates. Maximal degree in co-relation 76186. Up to 5598 conditions per place. [2024-06-03 19:14:24,644 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 569 selfloop transitions, 36 changer transitions 0/610 dead transitions. [2024-06-03 19:14:24,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 610 transitions, 7889 flow [2024-06-03 19:14:24,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:14:24,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:14:24,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-03 19:14:24,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-03 19:14:24,645 INFO L175 Difference]: Start difference. First operand has 457 places, 587 transitions, 6493 flow. Second operand 9 states and 159 transitions. [2024-06-03 19:14:24,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 610 transitions, 7889 flow [2024-06-03 19:14:29,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 610 transitions, 7745 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-03 19:14:29,716 INFO L231 Difference]: Finished difference. Result has 458 places, 590 transitions, 6559 flow [2024-06-03 19:14:29,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6349, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6559, PETRI_PLACES=458, PETRI_TRANSITIONS=590} [2024-06-03 19:14:29,716 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 414 predicate places. [2024-06-03 19:14:29,716 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 590 transitions, 6559 flow [2024-06-03 19:14:29,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:29,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:14:29,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:14:29,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-03 19:14:29,717 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:14:29,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:14:29,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1371630747, now seen corresponding path program 2 times [2024-06-03 19:14:29,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:14:29,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135379973] [2024-06-03 19:14:29,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:14:29,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:14:29,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:14:30,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:14:30,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:14:30,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135379973] [2024-06-03 19:14:30,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135379973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:14:30,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:14:30,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:14:30,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430338575] [2024-06-03 19:14:30,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:14:30,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:14:30,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:14:30,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:14:30,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:14:31,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:14:31,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 590 transitions, 6559 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:31,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:14:31,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:14:31,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:14:32,671 INFO L124 PetriNetUnfolderBase]: 3717/6079 cut-off events. [2024-06-03 19:14:32,671 INFO L125 PetriNetUnfolderBase]: For 2017846/2017848 co-relation queries the response was YES. [2024-06-03 19:14:32,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77714 conditions, 6079 events. 3717/6079 cut-off events. For 2017846/2017848 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 38833 event pairs, 737 based on Foata normal form. 4/6082 useless extension candidates. Maximal degree in co-relation 77498. Up to 5580 conditions per place. [2024-06-03 19:14:32,782 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 555 selfloop transitions, 60 changer transitions 0/620 dead transitions. [2024-06-03 19:14:32,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 620 transitions, 8481 flow [2024-06-03 19:14:32,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:14:32,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:14:32,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-03 19:14:32,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-03 19:14:32,784 INFO L175 Difference]: Start difference. First operand has 458 places, 590 transitions, 6559 flow. Second operand 9 states and 162 transitions. [2024-06-03 19:14:32,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 620 transitions, 8481 flow [2024-06-03 19:14:38,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 620 transitions, 8293 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-03 19:14:38,590 INFO L231 Difference]: Finished difference. Result has 461 places, 599 transitions, 6799 flow [2024-06-03 19:14:38,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6371, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6799, PETRI_PLACES=461, PETRI_TRANSITIONS=599} [2024-06-03 19:14:38,590 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 417 predicate places. [2024-06-03 19:14:38,590 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 599 transitions, 6799 flow [2024-06-03 19:14:38,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:38,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:14:38,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:14:38,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-03 19:14:38,591 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:14:38,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:14:38,591 INFO L85 PathProgramCache]: Analyzing trace with hash 569127671, now seen corresponding path program 4 times [2024-06-03 19:14:38,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:14:38,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978807570] [2024-06-03 19:14:38,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:14:38,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:14:38,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:14:39,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:14:39,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:14:39,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978807570] [2024-06-03 19:14:39,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978807570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:14:39,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:14:39,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:14:39,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239493633] [2024-06-03 19:14:39,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:14:39,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:14:39,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:14:39,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:14:39,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:14:40,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:14:40,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 599 transitions, 6799 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:40,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:14:40,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:14:40,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:14:41,782 INFO L124 PetriNetUnfolderBase]: 3738/6111 cut-off events. [2024-06-03 19:14:41,782 INFO L125 PetriNetUnfolderBase]: For 2060475/2060477 co-relation queries the response was YES. [2024-06-03 19:14:41,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78904 conditions, 6111 events. 3738/6111 cut-off events. For 2060475/2060477 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 39055 event pairs, 742 based on Foata normal form. 3/6113 useless extension candidates. Maximal degree in co-relation 78686. Up to 5516 conditions per place. [2024-06-03 19:14:41,902 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 529 selfloop transitions, 91 changer transitions 0/625 dead transitions. [2024-06-03 19:14:41,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 625 transitions, 8697 flow [2024-06-03 19:14:41,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:14:41,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:14:41,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-03 19:14:41,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-03 19:14:41,904 INFO L175 Difference]: Start difference. First operand has 461 places, 599 transitions, 6799 flow. Second operand 9 states and 165 transitions. [2024-06-03 19:14:41,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 625 transitions, 8697 flow [2024-06-03 19:14:49,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 625 transitions, 8490 flow, removed 72 selfloop flow, removed 5 redundant places. [2024-06-03 19:14:49,166 INFO L231 Difference]: Finished difference. Result has 466 places, 606 transitions, 7094 flow [2024-06-03 19:14:49,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6592, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7094, PETRI_PLACES=466, PETRI_TRANSITIONS=606} [2024-06-03 19:14:49,167 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 422 predicate places. [2024-06-03 19:14:49,167 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 606 transitions, 7094 flow [2024-06-03 19:14:49,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:49,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:14:49,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:14:49,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-03 19:14:49,168 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:14:49,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:14:49,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1371639551, now seen corresponding path program 7 times [2024-06-03 19:14:49,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:14:49,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000627908] [2024-06-03 19:14:49,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:14:49,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:14:49,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:14:50,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:14:50,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:14:50,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000627908] [2024-06-03 19:14:50,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000627908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:14:50,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:14:50,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:14:50,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276091404] [2024-06-03 19:14:50,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:14:50,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:14:50,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:14:50,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:14:50,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:14:50,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:14:50,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 606 transitions, 7094 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:50,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:14:50,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:14:50,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:14:52,369 INFO L124 PetriNetUnfolderBase]: 3759/6139 cut-off events. [2024-06-03 19:14:52,369 INFO L125 PetriNetUnfolderBase]: For 2126773/2126775 co-relation queries the response was YES. [2024-06-03 19:14:52,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80981 conditions, 6139 events. 3759/6139 cut-off events. For 2126773/2126775 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 39197 event pairs, 745 based on Foata normal form. 3/6141 useless extension candidates. Maximal degree in co-relation 80760. Up to 5507 conditions per place. [2024-06-03 19:14:52,481 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 514 selfloop transitions, 114 changer transitions 0/633 dead transitions. [2024-06-03 19:14:52,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 633 transitions, 9512 flow [2024-06-03 19:14:52,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:14:52,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:14:52,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-03 19:14:52,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-03 19:14:52,483 INFO L175 Difference]: Start difference. First operand has 466 places, 606 transitions, 7094 flow. Second operand 9 states and 164 transitions. [2024-06-03 19:14:52,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 633 transitions, 9512 flow [2024-06-03 19:14:59,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 633 transitions, 9302 flow, removed 65 selfloop flow, removed 5 redundant places. [2024-06-03 19:14:59,120 INFO L231 Difference]: Finished difference. Result has 470 places, 615 transitions, 7622 flow [2024-06-03 19:14:59,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6884, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7622, PETRI_PLACES=470, PETRI_TRANSITIONS=615} [2024-06-03 19:14:59,121 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 426 predicate places. [2024-06-03 19:14:59,121 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 615 transitions, 7622 flow [2024-06-03 19:14:59,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:14:59,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:14:59,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:14:59,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-03 19:14:59,122 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:14:59,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:14:59,122 INFO L85 PathProgramCache]: Analyzing trace with hash 2091693787, now seen corresponding path program 8 times [2024-06-03 19:14:59,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:14:59,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577590460] [2024-06-03 19:14:59,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:14:59,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:14:59,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:15:00,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:15:00,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:15:00,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577590460] [2024-06-03 19:15:00,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577590460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:15:00,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:15:00,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:15:00,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729170736] [2024-06-03 19:15:00,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:15:00,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:15:00,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:15:00,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:15:00,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:15:00,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:15:00,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 615 transitions, 7622 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:00,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:15:00,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:15:00,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:15:02,297 INFO L124 PetriNetUnfolderBase]: 3769/6149 cut-off events. [2024-06-03 19:15:02,297 INFO L125 PetriNetUnfolderBase]: For 2160231/2160231 co-relation queries the response was YES. [2024-06-03 19:15:02,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81844 conditions, 6149 events. 3769/6149 cut-off events. For 2160231/2160231 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 39183 event pairs, 734 based on Foata normal form. 1/6149 useless extension candidates. Maximal degree in co-relation 81621. Up to 5690 conditions per place. [2024-06-03 19:15:02,414 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 588 selfloop transitions, 44 changer transitions 0/637 dead transitions. [2024-06-03 19:15:02,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 637 transitions, 9137 flow [2024-06-03 19:15:02,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:15:02,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:15:02,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-03 19:15:02,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40568475452196384 [2024-06-03 19:15:02,415 INFO L175 Difference]: Start difference. First operand has 470 places, 615 transitions, 7622 flow. Second operand 9 states and 157 transitions. [2024-06-03 19:15:02,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 637 transitions, 9137 flow [2024-06-03 19:15:09,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 637 transitions, 8814 flow, removed 118 selfloop flow, removed 4 redundant places. [2024-06-03 19:15:09,856 INFO L231 Difference]: Finished difference. Result has 475 places, 621 transitions, 7606 flow [2024-06-03 19:15:09,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7327, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7606, PETRI_PLACES=475, PETRI_TRANSITIONS=621} [2024-06-03 19:15:09,857 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 431 predicate places. [2024-06-03 19:15:09,857 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 621 transitions, 7606 flow [2024-06-03 19:15:09,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:09,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:15:09,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:15:09,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-03 19:15:09,857 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:15:09,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:15:09,858 INFO L85 PathProgramCache]: Analyzing trace with hash 700223261, now seen corresponding path program 9 times [2024-06-03 19:15:09,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:15:09,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981469973] [2024-06-03 19:15:09,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:15:09,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:15:09,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:15:11,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:15:11,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:15:11,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981469973] [2024-06-03 19:15:11,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981469973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:15:11,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:15:11,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:15:11,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136083630] [2024-06-03 19:15:11,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:15:11,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:15:11,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:15:11,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:15:11,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:15:11,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:15:11,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 621 transitions, 7606 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:11,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:15:11,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:15:11,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:15:12,961 INFO L124 PetriNetUnfolderBase]: 3774/6160 cut-off events. [2024-06-03 19:15:12,961 INFO L125 PetriNetUnfolderBase]: For 2181551/2181553 co-relation queries the response was YES. [2024-06-03 19:15:13,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82006 conditions, 6160 events. 3774/6160 cut-off events. For 2181551/2181553 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 39321 event pairs, 745 based on Foata normal form. 3/6162 useless extension candidates. Maximal degree in co-relation 81781. Up to 5587 conditions per place. [2024-06-03 19:15:13,080 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 558 selfloop transitions, 77 changer transitions 0/640 dead transitions. [2024-06-03 19:15:13,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 640 transitions, 9072 flow [2024-06-03 19:15:13,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:15:13,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:15:13,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-03 19:15:13,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-03 19:15:13,082 INFO L175 Difference]: Start difference. First operand has 475 places, 621 transitions, 7606 flow. Second operand 9 states and 160 transitions. [2024-06-03 19:15:13,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 640 transitions, 9072 flow [2024-06-03 19:15:19,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 640 transitions, 8842 flow, removed 74 selfloop flow, removed 6 redundant places. [2024-06-03 19:15:19,325 INFO L231 Difference]: Finished difference. Result has 478 places, 624 transitions, 7694 flow [2024-06-03 19:15:19,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7376, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7694, PETRI_PLACES=478, PETRI_TRANSITIONS=624} [2024-06-03 19:15:19,326 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 434 predicate places. [2024-06-03 19:15:19,326 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 624 transitions, 7694 flow [2024-06-03 19:15:19,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:19,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:15:19,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:15:19,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-03 19:15:19,326 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:15:19,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:15:19,327 INFO L85 PathProgramCache]: Analyzing trace with hash 2091814191, now seen corresponding path program 3 times [2024-06-03 19:15:19,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:15:19,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267834017] [2024-06-03 19:15:19,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:15:19,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:15:19,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:15:20,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:15:20,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:15:20,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267834017] [2024-06-03 19:15:20,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267834017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:15:20,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:15:20,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:15:20,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379244753] [2024-06-03 19:15:20,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:15:20,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:15:20,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:15:20,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:15:20,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:15:20,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:15:20,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 624 transitions, 7694 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:20,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:15:20,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:15:20,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:15:22,471 INFO L124 PetriNetUnfolderBase]: 3784/6176 cut-off events. [2024-06-03 19:15:22,472 INFO L125 PetriNetUnfolderBase]: For 2217102/2217104 co-relation queries the response was YES. [2024-06-03 19:15:22,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82373 conditions, 6176 events. 3784/6176 cut-off events. For 2217102/2217104 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 39464 event pairs, 737 based on Foata normal form. 4/6179 useless extension candidates. Maximal degree in co-relation 82147. Up to 5669 conditions per place. [2024-06-03 19:15:22,595 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 584 selfloop transitions, 60 changer transitions 0/649 dead transitions. [2024-06-03 19:15:22,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 649 transitions, 9547 flow [2024-06-03 19:15:22,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:15:22,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:15:22,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-03 19:15:22,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-03 19:15:22,596 INFO L175 Difference]: Start difference. First operand has 478 places, 624 transitions, 7694 flow. Second operand 9 states and 164 transitions. [2024-06-03 19:15:22,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 649 transitions, 9547 flow [2024-06-03 19:15:30,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 649 transitions, 9257 flow, removed 70 selfloop flow, removed 7 redundant places. [2024-06-03 19:15:30,858 INFO L231 Difference]: Finished difference. Result has 480 places, 627 transitions, 7641 flow [2024-06-03 19:15:30,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7404, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7641, PETRI_PLACES=480, PETRI_TRANSITIONS=627} [2024-06-03 19:15:30,859 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 436 predicate places. [2024-06-03 19:15:30,859 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 627 transitions, 7641 flow [2024-06-03 19:15:30,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:30,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:15:30,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:15:30,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-03 19:15:30,860 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:15:30,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:15:30,860 INFO L85 PathProgramCache]: Analyzing trace with hash 700223044, now seen corresponding path program 10 times [2024-06-03 19:15:30,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:15:30,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249765583] [2024-06-03 19:15:30,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:15:30,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:15:30,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:15:31,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:15:31,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:15:31,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249765583] [2024-06-03 19:15:31,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249765583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:15:31,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:15:31,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:15:31,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643980984] [2024-06-03 19:15:31,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:15:31,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:15:31,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:15:31,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:15:31,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:15:31,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:15:31,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 627 transitions, 7641 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:31,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:15:31,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:15:31,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:15:33,829 INFO L124 PetriNetUnfolderBase]: 3842/6267 cut-off events. [2024-06-03 19:15:33,830 INFO L125 PetriNetUnfolderBase]: For 2335925/2335927 co-relation queries the response was YES. [2024-06-03 19:15:33,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85548 conditions, 6267 events. 3842/6267 cut-off events. For 2335925/2335927 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 40126 event pairs, 755 based on Foata normal form. 4/6270 useless extension candidates. Maximal degree in co-relation 85321. Up to 5424 conditions per place. [2024-06-03 19:15:33,953 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 521 selfloop transitions, 136 changer transitions 0/662 dead transitions. [2024-06-03 19:15:33,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 662 transitions, 10929 flow [2024-06-03 19:15:33,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:15:33,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:15:33,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-03 19:15:33,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-03 19:15:33,954 INFO L175 Difference]: Start difference. First operand has 480 places, 627 transitions, 7641 flow. Second operand 9 states and 172 transitions. [2024-06-03 19:15:33,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 662 transitions, 10929 flow [2024-06-03 19:15:40,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 662 transitions, 10745 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-03 19:15:40,485 INFO L231 Difference]: Finished difference. Result has 483 places, 639 transitions, 8581 flow [2024-06-03 19:15:40,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7457, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8581, PETRI_PLACES=483, PETRI_TRANSITIONS=639} [2024-06-03 19:15:40,485 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 439 predicate places. [2024-06-03 19:15:40,485 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 639 transitions, 8581 flow [2024-06-03 19:15:40,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:40,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:15:40,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:15:40,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-03 19:15:40,486 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:15:40,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:15:40,487 INFO L85 PathProgramCache]: Analyzing trace with hash 2083539547, now seen corresponding path program 10 times [2024-06-03 19:15:40,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:15:40,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171466388] [2024-06-03 19:15:40,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:15:40,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:15:40,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:15:41,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:15:41,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:15:41,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171466388] [2024-06-03 19:15:41,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171466388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:15:41,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:15:41,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:15:41,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621295939] [2024-06-03 19:15:41,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:15:41,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:15:41,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:15:41,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:15:41,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:15:41,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:15:41,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 639 transitions, 8581 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:41,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:15:41,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:15:41,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:15:43,737 INFO L124 PetriNetUnfolderBase]: 3855/6284 cut-off events. [2024-06-03 19:15:43,737 INFO L125 PetriNetUnfolderBase]: For 2382323/2382325 co-relation queries the response was YES. [2024-06-03 19:15:43,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86935 conditions, 6284 events. 3855/6284 cut-off events. For 2382323/2382325 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 40223 event pairs, 750 based on Foata normal form. 3/6286 useless extension candidates. Maximal degree in co-relation 86707. Up to 5686 conditions per place. [2024-06-03 19:15:43,875 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 569 selfloop transitions, 88 changer transitions 0/662 dead transitions. [2024-06-03 19:15:43,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 662 transitions, 10575 flow [2024-06-03 19:15:43,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:15:43,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:15:43,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-03 19:15:43,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-03 19:15:43,877 INFO L175 Difference]: Start difference. First operand has 483 places, 639 transitions, 8581 flow. Second operand 9 states and 162 transitions. [2024-06-03 19:15:43,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 662 transitions, 10575 flow [2024-06-03 19:15:51,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 662 transitions, 10249 flow, removed 133 selfloop flow, removed 3 redundant places. [2024-06-03 19:15:51,782 INFO L231 Difference]: Finished difference. Result has 489 places, 645 transitions, 8759 flow [2024-06-03 19:15:51,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8255, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8759, PETRI_PLACES=489, PETRI_TRANSITIONS=645} [2024-06-03 19:15:51,783 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 445 predicate places. [2024-06-03 19:15:51,783 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 645 transitions, 8759 flow [2024-06-03 19:15:51,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:51,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:15:51,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:15:51,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-03 19:15:51,784 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:15:51,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:15:51,784 INFO L85 PathProgramCache]: Analyzing trace with hash -889065375, now seen corresponding path program 5 times [2024-06-03 19:15:51,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:15:51,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575013647] [2024-06-03 19:15:51,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:15:51,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:15:51,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:15:52,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:15:52,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:15:52,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575013647] [2024-06-03 19:15:52,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575013647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:15:52,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:15:52,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:15:52,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570458249] [2024-06-03 19:15:52,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:15:52,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:15:52,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:15:52,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:15:52,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:15:53,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:15:53,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 645 transitions, 8759 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:15:53,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:15:53,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:15:53,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:15:54,993 INFO L124 PetriNetUnfolderBase]: 3865/6301 cut-off events. [2024-06-03 19:15:54,994 INFO L125 PetriNetUnfolderBase]: For 2395948/2395950 co-relation queries the response was YES. [2024-06-03 19:15:55,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86579 conditions, 6301 events. 3865/6301 cut-off events. For 2395948/2395950 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 40339 event pairs, 745 based on Foata normal form. 4/6304 useless extension candidates. Maximal degree in co-relation 86349. Up to 5743 conditions per place. [2024-06-03 19:15:55,130 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 596 selfloop transitions, 67 changer transitions 0/668 dead transitions. [2024-06-03 19:15:55,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 668 transitions, 10349 flow [2024-06-03 19:15:55,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:15:55,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:15:55,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-03 19:15:55,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-03 19:15:55,132 INFO L175 Difference]: Start difference. First operand has 489 places, 645 transitions, 8759 flow. Second operand 9 states and 163 transitions. [2024-06-03 19:15:55,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 668 transitions, 10349 flow [2024-06-03 19:16:03,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 668 transitions, 10102 flow, removed 77 selfloop flow, removed 5 redundant places. [2024-06-03 19:16:03,891 INFO L231 Difference]: Finished difference. Result has 493 places, 649 transitions, 8807 flow [2024-06-03 19:16:03,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8512, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8807, PETRI_PLACES=493, PETRI_TRANSITIONS=649} [2024-06-03 19:16:03,891 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 449 predicate places. [2024-06-03 19:16:03,891 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 649 transitions, 8807 flow [2024-06-03 19:16:03,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:16:03,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:16:03,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:16:03,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-03 19:16:03,892 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:16:03,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:16:03,893 INFO L85 PathProgramCache]: Analyzing trace with hash 2083539981, now seen corresponding path program 4 times [2024-06-03 19:16:03,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:16:03,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789973310] [2024-06-03 19:16:03,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:16:03,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:16:03,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:16:05,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:16:05,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:16:05,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789973310] [2024-06-03 19:16:05,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789973310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:16:05,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:16:05,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:16:05,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097548416] [2024-06-03 19:16:05,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:16:05,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:16:05,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:16:05,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:16:05,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:16:05,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:16:05,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 649 transitions, 8807 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:16:05,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:16:05,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:16:05,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:16:07,283 INFO L124 PetriNetUnfolderBase]: 3870/6307 cut-off events. [2024-06-03 19:16:07,283 INFO L125 PetriNetUnfolderBase]: For 2409138/2409140 co-relation queries the response was YES. [2024-06-03 19:16:07,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86912 conditions, 6307 events. 3870/6307 cut-off events. For 2409138/2409140 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 40356 event pairs, 743 based on Foata normal form. 3/6309 useless extension candidates. Maximal degree in co-relation 86680. Up to 5833 conditions per place. [2024-06-03 19:16:07,414 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 622 selfloop transitions, 42 changer transitions 0/669 dead transitions. [2024-06-03 19:16:07,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 669 transitions, 10303 flow [2024-06-03 19:16:07,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:16:07,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:16:07,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-03 19:16:07,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40568475452196384 [2024-06-03 19:16:07,415 INFO L175 Difference]: Start difference. First operand has 493 places, 649 transitions, 8807 flow. Second operand 9 states and 157 transitions. [2024-06-03 19:16:07,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 669 transitions, 10303 flow [2024-06-03 19:16:14,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 669 transitions, 10048 flow, removed 63 selfloop flow, removed 7 redundant places. [2024-06-03 19:16:14,747 INFO L231 Difference]: Finished difference. Result has 495 places, 652 transitions, 8766 flow [2024-06-03 19:16:14,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8552, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=607, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8766, PETRI_PLACES=495, PETRI_TRANSITIONS=652} [2024-06-03 19:16:14,748 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 451 predicate places. [2024-06-03 19:16:14,748 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 652 transitions, 8766 flow [2024-06-03 19:16:14,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:16:14,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:16:14,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:16:14,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-03 19:16:14,748 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:16:14,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:16:14,749 INFO L85 PathProgramCache]: Analyzing trace with hash 2083532820, now seen corresponding path program 11 times [2024-06-03 19:16:14,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:16:14,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005807251] [2024-06-03 19:16:14,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:16:14,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:16:14,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:16:15,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:16:15,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:16:15,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005807251] [2024-06-03 19:16:15,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005807251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:16:15,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:16:15,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:16:15,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310097264] [2024-06-03 19:16:15,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:16:15,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:16:15,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:16:15,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:16:15,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:16:15,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:16:15,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 652 transitions, 8766 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:16:15,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:16:15,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:16:15,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:16:17,770 INFO L124 PetriNetUnfolderBase]: 3864/6298 cut-off events. [2024-06-03 19:16:17,770 INFO L125 PetriNetUnfolderBase]: For 2417399/2417401 co-relation queries the response was YES. [2024-06-03 19:16:17,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86391 conditions, 6298 events. 3864/6298 cut-off events. For 2417399/2417401 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 40267 event pairs, 755 based on Foata normal form. 4/6301 useless extension candidates. Maximal degree in co-relation 86158. Up to 5458 conditions per place. [2024-06-03 19:16:17,904 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 530 selfloop transitions, 138 changer transitions 0/673 dead transitions. [2024-06-03 19:16:17,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 673 transitions, 10900 flow [2024-06-03 19:16:17,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:16:17,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:16:17,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-03 19:16:17,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-03 19:16:17,906 INFO L175 Difference]: Start difference. First operand has 495 places, 652 transitions, 8766 flow. Second operand 9 states and 169 transitions. [2024-06-03 19:16:17,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 673 transitions, 10900 flow [2024-06-03 19:16:27,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 673 transitions, 10562 flow, removed 129 selfloop flow, removed 7 redundant places. [2024-06-03 19:16:27,233 INFO L231 Difference]: Finished difference. Result has 497 places, 652 transitions, 8710 flow [2024-06-03 19:16:27,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8428, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8710, PETRI_PLACES=497, PETRI_TRANSITIONS=652} [2024-06-03 19:16:27,234 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 453 predicate places. [2024-06-03 19:16:27,234 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 652 transitions, 8710 flow [2024-06-03 19:16:27,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:16:27,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:16:27,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:16:27,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-03 19:16:27,235 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:16:27,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:16:27,235 INFO L85 PathProgramCache]: Analyzing trace with hash 2080075297, now seen corresponding path program 11 times [2024-06-03 19:16:27,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:16:27,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529689508] [2024-06-03 19:16:27,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:16:27,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:16:27,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:16:28,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:16:28,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:16:28,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529689508] [2024-06-03 19:16:28,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529689508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:16:28,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:16:28,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:16:28,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118428756] [2024-06-03 19:16:28,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:16:28,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:16:28,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:16:28,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:16:28,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:16:28,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:16:28,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 652 transitions, 8710 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:16:28,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:16:28,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:16:28,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:16:30,546 INFO L124 PetriNetUnfolderBase]: 3861/6291 cut-off events. [2024-06-03 19:16:30,546 INFO L125 PetriNetUnfolderBase]: For 2412194/2412194 co-relation queries the response was YES. [2024-06-03 19:16:30,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86266 conditions, 6291 events. 3861/6291 cut-off events. For 2412194/2412194 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 40213 event pairs, 738 based on Foata normal form. 1/6291 useless extension candidates. Maximal degree in co-relation 86032. Up to 5820 conditions per place. [2024-06-03 19:16:30,667 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 623 selfloop transitions, 42 changer transitions 0/670 dead transitions. [2024-06-03 19:16:30,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 670 transitions, 10414 flow [2024-06-03 19:16:30,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:16:30,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:16:30,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-03 19:16:30,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-03 19:16:30,668 INFO L175 Difference]: Start difference. First operand has 497 places, 652 transitions, 8710 flow. Second operand 10 states and 172 transitions. [2024-06-03 19:16:30,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 670 transitions, 10414 flow [2024-06-03 19:16:39,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 670 transitions, 10018 flow, removed 66 selfloop flow, removed 7 redundant places. [2024-06-03 19:16:39,075 INFO L231 Difference]: Finished difference. Result has 500 places, 652 transitions, 8404 flow [2024-06-03 19:16:39,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8314, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=610, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8404, PETRI_PLACES=500, PETRI_TRANSITIONS=652} [2024-06-03 19:16:39,076 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 456 predicate places. [2024-06-03 19:16:39,076 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 652 transitions, 8404 flow [2024-06-03 19:16:39,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:16:39,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:16:39,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:16:39,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-03 19:16:39,076 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:16:39,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:16:39,077 INFO L85 PathProgramCache]: Analyzing trace with hash 553515575, now seen corresponding path program 6 times [2024-06-03 19:16:39,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:16:39,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863519024] [2024-06-03 19:16:39,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:16:39,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:16:39,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:16:40,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:16:40,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:16:40,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863519024] [2024-06-03 19:16:40,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863519024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:16:40,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:16:40,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:16:40,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178912389] [2024-06-03 19:16:40,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:16:40,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:16:40,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:16:40,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:16:40,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:16:40,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:16:40,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 652 transitions, 8404 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:16:40,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:16:40,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:16:40,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:16:42,325 INFO L124 PetriNetUnfolderBase]: 3866/6303 cut-off events. [2024-06-03 19:16:42,325 INFO L125 PetriNetUnfolderBase]: For 2435769/2435771 co-relation queries the response was YES. [2024-06-03 19:16:42,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86088 conditions, 6303 events. 3866/6303 cut-off events. For 2435769/2435771 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 40371 event pairs, 744 based on Foata normal form. 3/6305 useless extension candidates. Maximal degree in co-relation 85853. Up to 5739 conditions per place. [2024-06-03 19:16:42,453 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 597 selfloop transitions, 72 changer transitions 0/674 dead transitions. [2024-06-03 19:16:42,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 674 transitions, 9961 flow [2024-06-03 19:16:42,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:16:42,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:16:42,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-03 19:16:42,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-03 19:16:42,455 INFO L175 Difference]: Start difference. First operand has 500 places, 652 transitions, 8404 flow. Second operand 9 states and 165 transitions. [2024-06-03 19:16:42,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 674 transitions, 9961 flow [2024-06-03 19:16:52,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 674 transitions, 9807 flow, removed 19 selfloop flow, removed 10 redundant places. [2024-06-03 19:16:52,428 INFO L231 Difference]: Finished difference. Result has 499 places, 655 transitions, 8507 flow [2024-06-03 19:16:52,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8250, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8507, PETRI_PLACES=499, PETRI_TRANSITIONS=655} [2024-06-03 19:16:52,428 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 455 predicate places. [2024-06-03 19:16:52,429 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 655 transitions, 8507 flow [2024-06-03 19:16:52,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:16:52,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:16:52,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:16:52,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-03 19:16:52,429 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:16:52,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:16:52,430 INFO L85 PathProgramCache]: Analyzing trace with hash 2079808387, now seen corresponding path program 12 times [2024-06-03 19:16:52,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:16:52,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340726333] [2024-06-03 19:16:52,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:16:52,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:16:52,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:16:53,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:16:53,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:16:53,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340726333] [2024-06-03 19:16:53,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340726333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:16:53,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:16:53,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:16:53,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394484875] [2024-06-03 19:16:53,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:16:53,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:16:53,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:16:53,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:16:53,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:16:53,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:16:53,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 655 transitions, 8507 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:16:53,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:16:53,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:16:53,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:16:55,703 INFO L124 PetriNetUnfolderBase]: 3863/6294 cut-off events. [2024-06-03 19:16:55,703 INFO L125 PetriNetUnfolderBase]: For 2447963/2447963 co-relation queries the response was YES. [2024-06-03 19:16:55,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86039 conditions, 6294 events. 3863/6294 cut-off events. For 2447963/2447963 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 40147 event pairs, 738 based on Foata normal form. 1/6294 useless extension candidates. Maximal degree in co-relation 85805. Up to 5830 conditions per place. [2024-06-03 19:16:55,827 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 630 selfloop transitions, 36 changer transitions 0/671 dead transitions. [2024-06-03 19:16:55,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 671 transitions, 9883 flow [2024-06-03 19:16:55,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:16:55,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:16:55,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-03 19:16:55,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-03 19:16:55,828 INFO L175 Difference]: Start difference. First operand has 499 places, 655 transitions, 8507 flow. Second operand 9 states and 156 transitions. [2024-06-03 19:16:55,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 671 transitions, 9883 flow [2024-06-03 19:17:05,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 671 transitions, 9527 flow, removed 108 selfloop flow, removed 7 redundant places. [2024-06-03 19:17:05,031 INFO L231 Difference]: Finished difference. Result has 501 places, 655 transitions, 8229 flow [2024-06-03 19:17:05,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8151, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8229, PETRI_PLACES=501, PETRI_TRANSITIONS=655} [2024-06-03 19:17:05,032 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 457 predicate places. [2024-06-03 19:17:05,032 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 655 transitions, 8229 flow [2024-06-03 19:17:05,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:17:05,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:17:05,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:17:05,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-03 19:17:05,033 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:17:05,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:17:05,033 INFO L85 PathProgramCache]: Analyzing trace with hash -507546712, now seen corresponding path program 12 times [2024-06-03 19:17:05,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:17:05,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927758637] [2024-06-03 19:17:05,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:17:05,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:17:05,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:17:06,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:17:06,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:17:06,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927758637] [2024-06-03 19:17:06,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927758637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:17:06,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:17:06,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:17:06,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485212342] [2024-06-03 19:17:06,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:17:06,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:17:06,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:17:06,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:17:06,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:17:06,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:17:06,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 655 transitions, 8229 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:17:06,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:17:06,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:17:06,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:17:08,062 INFO L124 PetriNetUnfolderBase]: 3857/6286 cut-off events. [2024-06-03 19:17:08,063 INFO L125 PetriNetUnfolderBase]: For 2457542/2457542 co-relation queries the response was YES. [2024-06-03 19:17:08,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85361 conditions, 6286 events. 3857/6286 cut-off events. For 2457542/2457542 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 40169 event pairs, 737 based on Foata normal form. 2/6287 useless extension candidates. Maximal degree in co-relation 85126. Up to 5819 conditions per place. [2024-06-03 19:17:08,192 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 631 selfloop transitions, 36 changer transitions 0/672 dead transitions. [2024-06-03 19:17:08,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 672 transitions, 9641 flow [2024-06-03 19:17:08,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:17:08,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:17:08,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-03 19:17:08,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40568475452196384 [2024-06-03 19:17:08,193 INFO L175 Difference]: Start difference. First operand has 501 places, 655 transitions, 8229 flow. Second operand 9 states and 157 transitions. [2024-06-03 19:17:08,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 672 transitions, 9641 flow [2024-06-03 19:17:17,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 672 transitions, 9409 flow, removed 74 selfloop flow, removed 8 redundant places. [2024-06-03 19:17:17,336 INFO L231 Difference]: Finished difference. Result has 502 places, 655 transitions, 8075 flow [2024-06-03 19:17:17,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7997, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8075, PETRI_PLACES=502, PETRI_TRANSITIONS=655} [2024-06-03 19:17:17,336 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 458 predicate places. [2024-06-03 19:17:17,336 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 655 transitions, 8075 flow [2024-06-03 19:17:17,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:17:17,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:17:17,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:17:17,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-03 19:17:17,337 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:17:17,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:17:17,338 INFO L85 PathProgramCache]: Analyzing trace with hash 594344133, now seen corresponding path program 1 times [2024-06-03 19:17:17,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:17:17,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573406268] [2024-06-03 19:17:17,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:17:17,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:17:17,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:17:18,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:17:18,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:17:18,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573406268] [2024-06-03 19:17:18,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573406268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:17:18,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:17:18,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:17:18,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239168602] [2024-06-03 19:17:18,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:17:18,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:17:18,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:17:18,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:17:18,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:17:18,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:17:18,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 655 transitions, 8075 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:17:18,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:17:18,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:17:18,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:17:20,373 INFO L124 PetriNetUnfolderBase]: 3749/6154 cut-off events. [2024-06-03 19:17:20,374 INFO L125 PetriNetUnfolderBase]: For 2476311/2476311 co-relation queries the response was YES. [2024-06-03 19:17:20,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84419 conditions, 6154 events. 3749/6154 cut-off events. For 2476311/2476311 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 39752 event pairs, 587 based on Foata normal form. 2/6134 useless extension candidates. Maximal degree in co-relation 84183. Up to 5414 conditions per place. [2024-06-03 19:17:20,498 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 574 selfloop transitions, 31 changer transitions 0/685 dead transitions. [2024-06-03 19:17:20,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 685 transitions, 9447 flow [2024-06-03 19:17:20,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:17:20,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:17:20,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-03 19:17:20,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-03 19:17:20,500 INFO L175 Difference]: Start difference. First operand has 502 places, 655 transitions, 8075 flow. Second operand 9 states and 171 transitions. [2024-06-03 19:17:20,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 685 transitions, 9447 flow [2024-06-03 19:17:28,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 685 transitions, 9335 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-03 19:17:28,660 INFO L231 Difference]: Finished difference. Result has 502 places, 657 transitions, 8114 flow [2024-06-03 19:17:28,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7963, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=624, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8114, PETRI_PLACES=502, PETRI_TRANSITIONS=657} [2024-06-03 19:17:28,660 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 458 predicate places. [2024-06-03 19:17:28,660 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 657 transitions, 8114 flow [2024-06-03 19:17:28,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:17:28,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:17:28,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:17:28,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-03 19:17:28,661 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:17:28,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:17:28,661 INFO L85 PathProgramCache]: Analyzing trace with hash 889563333, now seen corresponding path program 2 times [2024-06-03 19:17:28,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:17:28,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490546967] [2024-06-03 19:17:28,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:17:28,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:17:28,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:17:29,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:17:29,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:17:29,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490546967] [2024-06-03 19:17:29,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490546967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:17:29,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:17:29,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:17:29,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397467966] [2024-06-03 19:17:29,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:17:29,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:17:29,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:17:29,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:17:29,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:17:29,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:17:29,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 657 transitions, 8114 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:17:29,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:17:29,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:17:29,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:17:31,867 INFO L124 PetriNetUnfolderBase]: 3757/6168 cut-off events. [2024-06-03 19:17:31,867 INFO L125 PetriNetUnfolderBase]: For 2502260/2502260 co-relation queries the response was YES. [2024-06-03 19:17:31,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84902 conditions, 6168 events. 3757/6168 cut-off events. For 2502260/2502260 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 39942 event pairs, 711 based on Foata normal form. 2/6133 useless extension candidates. Maximal degree in co-relation 84665. Up to 5463 conditions per place. [2024-06-03 19:17:31,987 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 571 selfloop transitions, 32 changer transitions 0/683 dead transitions. [2024-06-03 19:17:31,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 683 transitions, 9474 flow [2024-06-03 19:17:31,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:17:31,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:17:31,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-03 19:17:31,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-03 19:17:31,988 INFO L175 Difference]: Start difference. First operand has 502 places, 657 transitions, 8114 flow. Second operand 9 states and 168 transitions. [2024-06-03 19:17:31,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 683 transitions, 9474 flow [2024-06-03 19:17:39,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 683 transitions, 9339 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-03 19:17:39,891 INFO L231 Difference]: Finished difference. Result has 504 places, 659 transitions, 8136 flow [2024-06-03 19:17:39,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7979, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=625, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8136, PETRI_PLACES=504, PETRI_TRANSITIONS=659} [2024-06-03 19:17:39,891 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 460 predicate places. [2024-06-03 19:17:39,892 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 659 transitions, 8136 flow [2024-06-03 19:17:39,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:17:39,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:17:39,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:17:39,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-03 19:17:39,892 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:17:39,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:17:39,892 INFO L85 PathProgramCache]: Analyzing trace with hash -839750121, now seen corresponding path program 3 times [2024-06-03 19:17:39,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:17:39,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879671768] [2024-06-03 19:17:39,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:17:39,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:17:39,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:17:41,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:17:41,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:17:41,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879671768] [2024-06-03 19:17:41,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879671768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:17:41,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:17:41,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:17:41,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445314561] [2024-06-03 19:17:41,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:17:41,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:17:41,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:17:41,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:17:41,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:17:41,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:17:41,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 659 transitions, 8136 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:17:41,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:17:41,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:17:41,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:17:43,209 INFO L124 PetriNetUnfolderBase]: 3765/6180 cut-off events. [2024-06-03 19:17:43,209 INFO L125 PetriNetUnfolderBase]: For 2531353/2531353 co-relation queries the response was YES. [2024-06-03 19:17:43,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85250 conditions, 6180 events. 3765/6180 cut-off events. For 2531353/2531353 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 40010 event pairs, 713 based on Foata normal form. 2/6145 useless extension candidates. Maximal degree in co-relation 85012. Up to 5480 conditions per place. [2024-06-03 19:17:43,338 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 571 selfloop transitions, 33 changer transitions 0/684 dead transitions. [2024-06-03 19:17:43,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 684 transitions, 9500 flow [2024-06-03 19:17:43,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:17:43,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:17:43,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-03 19:17:43,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-03 19:17:43,340 INFO L175 Difference]: Start difference. First operand has 504 places, 659 transitions, 8136 flow. Second operand 9 states and 168 transitions. [2024-06-03 19:17:43,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 684 transitions, 9500 flow [2024-06-03 19:17:50,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 684 transitions, 9359 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-03 19:17:50,996 INFO L231 Difference]: Finished difference. Result has 506 places, 661 transitions, 8158 flow [2024-06-03 19:17:50,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7995, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8158, PETRI_PLACES=506, PETRI_TRANSITIONS=661} [2024-06-03 19:17:50,997 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 462 predicate places. [2024-06-03 19:17:50,997 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 661 transitions, 8158 flow [2024-06-03 19:17:50,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:17:50,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:17:50,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:17:50,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-03 19:17:50,997 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:17:50,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:17:50,998 INFO L85 PathProgramCache]: Analyzing trace with hash 2091690811, now seen corresponding path program 4 times [2024-06-03 19:17:50,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:17:50,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443957731] [2024-06-03 19:17:50,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:17:50,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:17:51,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:17:52,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:17:52,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:17:52,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443957731] [2024-06-03 19:17:52,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443957731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:17:52,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:17:52,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:17:52,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514056197] [2024-06-03 19:17:52,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:17:52,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:17:52,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:17:52,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:17:52,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:17:52,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:17:52,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 661 transitions, 8158 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:17:52,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:17:52,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:17:52,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:17:54,419 INFO L124 PetriNetUnfolderBase]: 3773/6190 cut-off events. [2024-06-03 19:17:54,419 INFO L125 PetriNetUnfolderBase]: For 2557243/2557243 co-relation queries the response was YES. [2024-06-03 19:17:54,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85602 conditions, 6190 events. 3773/6190 cut-off events. For 2557243/2557243 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 40046 event pairs, 717 based on Foata normal form. 2/6155 useless extension candidates. Maximal degree in co-relation 85363. Up to 5473 conditions per place. [2024-06-03 19:17:54,545 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 557 selfloop transitions, 43 changer transitions 0/680 dead transitions. [2024-06-03 19:17:54,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 680 transitions, 9496 flow [2024-06-03 19:17:54,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:17:54,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:17:54,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-03 19:17:54,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-03 19:17:54,547 INFO L175 Difference]: Start difference. First operand has 506 places, 661 transitions, 8158 flow. Second operand 9 states and 165 transitions. [2024-06-03 19:17:54,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 680 transitions, 9496 flow [2024-06-03 19:18:04,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 680 transitions, 9341 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-03 19:18:04,548 INFO L231 Difference]: Finished difference. Result has 508 places, 663 transitions, 8190 flow [2024-06-03 19:18:04,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8003, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=618, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8190, PETRI_PLACES=508, PETRI_TRANSITIONS=663} [2024-06-03 19:18:04,549 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 464 predicate places. [2024-06-03 19:18:04,549 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 663 transitions, 8190 flow [2024-06-03 19:18:04,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:04,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:04,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:04,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-03 19:18:04,549 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:18:04,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:04,550 INFO L85 PathProgramCache]: Analyzing trace with hash 2080072321, now seen corresponding path program 5 times [2024-06-03 19:18:04,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:04,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971191401] [2024-06-03 19:18:04,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:04,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:04,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:06,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:18:06,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:06,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971191401] [2024-06-03 19:18:06,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971191401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:06,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:06,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:18:06,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217297383] [2024-06-03 19:18:06,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:06,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:18:06,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:06,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:18:06,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:18:06,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:18:06,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 663 transitions, 8190 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:06,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:06,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:18:06,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:08,169 INFO L124 PetriNetUnfolderBase]: 3781/6202 cut-off events. [2024-06-03 19:18:08,169 INFO L125 PetriNetUnfolderBase]: For 2583110/2583110 co-relation queries the response was YES. [2024-06-03 19:18:08,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85963 conditions, 6202 events. 3781/6202 cut-off events. For 2583110/2583110 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 40118 event pairs, 719 based on Foata normal form. 2/6167 useless extension candidates. Maximal degree in co-relation 85723. Up to 5494 conditions per place. [2024-06-03 19:18:08,313 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 567 selfloop transitions, 35 changer transitions 0/682 dead transitions. [2024-06-03 19:18:08,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 682 transitions, 9536 flow [2024-06-03 19:18:08,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:18:08,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:18:08,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-03 19:18:08,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-03 19:18:08,314 INFO L175 Difference]: Start difference. First operand has 508 places, 663 transitions, 8190 flow. Second operand 9 states and 164 transitions. [2024-06-03 19:18:08,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 682 transitions, 9536 flow [2024-06-03 19:18:17,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 682 transitions, 9365 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-03 19:18:17,251 INFO L231 Difference]: Finished difference. Result has 510 places, 665 transitions, 8194 flow [2024-06-03 19:18:17,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8019, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=628, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8194, PETRI_PLACES=510, PETRI_TRANSITIONS=665} [2024-06-03 19:18:17,252 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 466 predicate places. [2024-06-03 19:18:17,252 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 665 transitions, 8194 flow [2024-06-03 19:18:17,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:17,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:17,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:17,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-03 19:18:17,252 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:18:17,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:17,253 INFO L85 PathProgramCache]: Analyzing trace with hash 696411935, now seen corresponding path program 6 times [2024-06-03 19:18:17,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:17,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462651852] [2024-06-03 19:18:17,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:17,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:17,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:18,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:18:18,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:18,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462651852] [2024-06-03 19:18:18,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462651852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:18,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:18,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:18:18,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239479798] [2024-06-03 19:18:18,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:18,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:18:18,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:18,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:18:18,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:18:18,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:18:18,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 665 transitions, 8194 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:18,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:18,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:18:18,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:20,524 INFO L124 PetriNetUnfolderBase]: 3789/6212 cut-off events. [2024-06-03 19:18:20,524 INFO L125 PetriNetUnfolderBase]: For 2609424/2609424 co-relation queries the response was YES. [2024-06-03 19:18:20,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86299 conditions, 6212 events. 3789/6212 cut-off events. For 2609424/2609424 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 40164 event pairs, 717 based on Foata normal form. 2/6177 useless extension candidates. Maximal degree in co-relation 86058. Up to 5501 conditions per place. [2024-06-03 19:18:20,651 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 571 selfloop transitions, 34 changer transitions 0/685 dead transitions. [2024-06-03 19:18:20,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 685 transitions, 9552 flow [2024-06-03 19:18:20,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:18:20,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:18:20,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-03 19:18:20,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-03 19:18:20,652 INFO L175 Difference]: Start difference. First operand has 510 places, 665 transitions, 8194 flow. Second operand 9 states and 164 transitions. [2024-06-03 19:18:20,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 685 transitions, 9552 flow [2024-06-03 19:18:29,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 685 transitions, 9389 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-03 19:18:29,353 INFO L231 Difference]: Finished difference. Result has 512 places, 667 transitions, 8208 flow [2024-06-03 19:18:29,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8031, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=631, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8208, PETRI_PLACES=512, PETRI_TRANSITIONS=667} [2024-06-03 19:18:29,353 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 468 predicate places. [2024-06-03 19:18:29,353 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 667 transitions, 8208 flow [2024-06-03 19:18:29,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:29,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:29,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:29,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-03 19:18:29,354 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:18:29,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:29,354 INFO L85 PathProgramCache]: Analyzing trace with hash 2092121773, now seen corresponding path program 1 times [2024-06-03 19:18:29,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:29,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571086774] [2024-06-03 19:18:29,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:29,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:29,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:31,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:18:31,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:31,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571086774] [2024-06-03 19:18:31,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571086774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:31,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:31,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:18:31,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754465908] [2024-06-03 19:18:31,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:31,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:18:31,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:31,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:18:31,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:18:31,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-03 19:18:31,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 667 transitions, 8208 flow. Second operand has 11 states, 11 states have (on average 13.636363636363637) internal successors, (150), 11 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:31,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:31,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-03 19:18:31,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:18:33,670 INFO L124 PetriNetUnfolderBase]: 3637/6012 cut-off events. [2024-06-03 19:18:33,670 INFO L125 PetriNetUnfolderBase]: For 2749265/2749289 co-relation queries the response was YES. [2024-06-03 19:18:33,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85717 conditions, 6012 events. 3637/6012 cut-off events. For 2749265/2749289 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 39295 event pairs, 686 based on Foata normal form. 28/5953 useless extension candidates. Maximal degree in co-relation 85475. Up to 5015 conditions per place. [2024-06-03 19:18:33,789 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 489 selfloop transitions, 50 changer transitions 0/689 dead transitions. [2024-06-03 19:18:33,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 689 transitions, 9498 flow [2024-06-03 19:18:33,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:18:33,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:18:33,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-03 19:18:33,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4372093023255814 [2024-06-03 19:18:33,801 INFO L175 Difference]: Start difference. First operand has 512 places, 667 transitions, 8208 flow. Second operand 10 states and 188 transitions. [2024-06-03 19:18:33,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 689 transitions, 9498 flow [2024-06-03 19:18:43,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 689 transitions, 9337 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-03 19:18:43,553 INFO L231 Difference]: Finished difference. Result has 515 places, 668 transitions, 8215 flow [2024-06-03 19:18:43,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=8047, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=617, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8215, PETRI_PLACES=515, PETRI_TRANSITIONS=668} [2024-06-03 19:18:43,565 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 471 predicate places. [2024-06-03 19:18:43,566 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 668 transitions, 8215 flow [2024-06-03 19:18:43,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.636363636363637) internal successors, (150), 11 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:43,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:18:43,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:18:43,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-03 19:18:43,566 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:18:43,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:18:43,567 INFO L85 PathProgramCache]: Analyzing trace with hash 497325343, now seen corresponding path program 2 times [2024-06-03 19:18:43,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:18:43,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925148489] [2024-06-03 19:18:43,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:18:43,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:18:43,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:18:44,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:18:44,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:18:44,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925148489] [2024-06-03 19:18:44,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925148489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:18:44,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:18:44,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:18:44,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093309193] [2024-06-03 19:18:44,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:18:44,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:18:44,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:18:44,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:18:44,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:18:44,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:18:44,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 668 transitions, 8215 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:18:44,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:18:44,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:18:44,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15